diff --git a/web/src/main/frontend/components/content.cljs b/web/src/main/frontend/components/content.cljs
index be8059af1..e832cfbdd 100644
--- a/web/src/main/frontend/components/content.cljs
+++ b/web/src/main/frontend/components/content.cljs
@@ -76,9 +76,10 @@
                       (state/hide-custom-context-menu!)
 
                       ;; enable scroll
-                      (let [main (d/by-id "main")]
+                      (let [main (d/by-id "main-content")]
                         (d/remove-class! main "overflow-hidden")
-                        (d/add-class! main "overflow-y-scroll"))
+                        (d/add-class! main "overflow-y-auto")
+                        )
 
                       (handler/clear-selection!)))
 
@@ -88,9 +89,9 @@
                         (util/stop e)
                         (let [client-x (gobj/get e "clientX")
                               client-y (gobj/get e "clientY")]
-                          (let [main (d/by-id "main")]
+                          (let [main (d/by-id "main-content")]
                             ;; disable scroll
-                            (d/remove-class! main "overflow-y-scroll")
+                            (d/remove-class! main "overflow-y-auto")
                             (d/add-class! main "overflow-hidden"))
 
                           (state/show-custom-context-menu!)
diff --git a/web/src/main/frontend/components/hiccup.cljs b/web/src/main/frontend/components/hiccup.cljs
index 4361c50ee..83813376d 100644
--- a/web/src/main/frontend/components/hiccup.cljs
+++ b/web/src/main/frontend/components/hiccup.cljs
@@ -176,10 +176,8 @@
     ["Target" s]
     [:a {:id s} s]
 
-
     ["Radio_Target" s]
     [:a {:id s} s]
-    ;; [:a {:href (str "/page/" (util/url-encode s))} (str "<<<" s ">>>")]
 
     ["Email" address]
     (let [{:keys [local_part domain]} address
@@ -194,7 +192,13 @@
         (when-let [heading (db/get-heading-by-uuid (uuid id))]
           [:span
            [:span.text-gray-500 "(("]
-           [:a {:href (str "/page/" id)}
+           [:a {:href (str "/page/" id)
+                :on-click (fn [e]
+                            (util/stop e)
+                            (when (gobj/get e "shiftKey")
+                              (state/sidebar-add-block! :heading-ref {:heading (:heading config)
+                                                                      :ref-heading heading})
+                              (handler/show-right-sidebar)))}
             (->elem :span.block-ref
                     (map-inline config (:heading/title heading)))]
            [:span.text-gray-500 "))"]])))
@@ -212,7 +216,14 @@
           ;; page reference
           [:span.page-reference
            [:span.text-gray-500 "[["]
-           [:a {:href (str "/page/" (util/url-encode s))} s]
+           [:a {:href (str "/page/" (util/url-encode s))
+                :on-click (fn [e]
+                            (util/stop e)
+                            (when (gobj/get e "shiftKey")
+                              (state/sidebar-add-block! :page-ref
+                                                        {:heading (:heading config)
+                                                         :ref-page s})
+                              (handler/show-right-sidebar)))} s]
            [:span.text-gray-500 "]]"]])
         :else
         (let [href (string-of-url url)
@@ -222,8 +233,8 @@
             (->elem
              :a
              (cond->
-               {:href href
-                :target "_blank"}
+                 {:href href
+                  :target "_blank"}
                title
                (assoc :title title))
              (map-inline config label))))))
@@ -344,10 +355,15 @@
         [:span ""])]
      [:a.flex.flex-row.items-center.justify-center
       (cond->
-        {:style {:width 14
-                 :height 24}}
+          {:style {:width 14
+                   :height 24}}
         (not dummy?)
-        (assoc :href (str "/page/" uuid)))
+        (assoc :href (str "/page/" uuid)
+               :on-click (fn [e]
+                           (util/stop e)
+                           (when (gobj/get e "shiftKey")
+                             (state/sidebar-add-block! :heading (:heading config))
+                             (handler/show-right-sidebar)))))
       [:svg {:height 10
              :width 10
              :fill "currentColor"
@@ -359,7 +375,8 @@
 (rum/defcs heading-cp < rum/reactive
   (rum/local false ::collapsed?)
   [state {:heading/keys [uuid idx level children meta content dummy? lock? show-page? page format] :as heading} heading-part config]
-  (let [ref? (boolean (:ref? config))
+  (let [config (assoc config :heading heading)
+        ref? (boolean (:ref? config))
         edit-input-id (str "edit-heading-" (if ref? (:id config)) uuid)
         edit? (state/sub [:editor/editing? edit-input-id])
         heading-id (str "ls-heading-parent-" (if ref? (:id config)) uuid)
@@ -417,8 +434,7 @@
                            (swap! state/state assoc
                                   :edit-content content
                                   :edit-heading heading)
-                           (state/set-edit-input-id! edit-input-id)
-                           ))}
+                           (state/set-edit-input-id! edit-input-id)))}
             heading-part
 
             ;; non-heading children
@@ -452,7 +468,8 @@
 (defn heading
   [config {:heading/keys [uuid title tags marker level priority anchor meta numbering children format]
            :as t}]
-  (let [agenda? (= (:id config) "agenda")
+  (let [config (assoc config :heading t)
+        agenda? (= (:id config) "agenda")
         checkbox (heading-checkbox t
                                    (str "mr-1 cursor"))
         marker-cp (if (contains? #{"DOING" "IN-PROGRESS" "WAIT"} marker)
diff --git a/web/src/main/frontend/components/journal.cljs b/web/src/main/frontend/components/journal.cljs
index 70c474b95..5d5d3e279 100644
--- a/web/src/main/frontend/components/journal.cljs
+++ b/web/src/main/frontend/components/journal.cljs
@@ -3,13 +3,15 @@
             [frontend.util :as util]
             [frontend.handler :as handler]
             [frontend.db :as db]
+            [frontend.state :as state]
             [clojure.string :as string]
             [frontend.ui :as ui]
             [frontend.format :as format]
             [frontend.components.content :as content]
             [frontend.components.hiccup :as hiccup]
             [frontend.components.reference :as reference]
-            [frontend.utf8 :as utf8]))
+            [frontend.utf8 :as utf8]
+            [goog.object :as gobj]))
 
 (rum/defc journal-cp
   [[title headings format]]
@@ -20,7 +22,12 @@
 
         encoded-page-name (util/url-encode (string/capitalize title))]
     [:div.flex-1
-     [:a.initial-color {:href (str "/page/" encoded-page-name)}
+     [:a.initial-color {:href (str "/page/" encoded-page-name)
+                        :on-click (fn [e]
+                                    (util/stop e)
+                                    (when (gobj/get e "shiftKey")
+                                      (state/sidebar-add-block! :page {:name title})
+                                      (handler/show-right-sidebar)))}
       [:h1.title
        title]]
      (content/content encoded-page-name
diff --git a/web/src/main/frontend/components/page.cljs b/web/src/main/frontend/components/page.cljs
index 58edb3070..70e1589b2 100644
--- a/web/src/main/frontend/components/page.cljs
+++ b/web/src/main/frontend/components/page.cljs
@@ -12,7 +12,8 @@
             [frontend.format :as format]
             [frontend.components.content :as content]
             [frontend.config :as config]
-            [frontend.db :as db]))
+            [frontend.db :as db]
+            [goog.object :as gobj]))
 
 (defn- get-page-name
   [state]
@@ -31,7 +32,7 @@
 
 ;; A page is just a logical heading
 (rum/defcs page < rum/reactive
-  [state]
+  [state option]
   (let [encoded-page-name (get-page-name state)
         page-name (string/capitalize (util/url-decode encoded-page-name))
         format (db/get-page-format page-name)
@@ -46,13 +47,6 @@
         hiccup (hiccup/->hiccup page-headings {:id encoded-page-name
                                                :start-level start-level})
 
-        ref-headings (if heading-id
-                       (db/get-heading-referenced-headings heading-id)
-                       (db/get-page-referenced-headings page-name))
-        ref-headings (mapv (fn [heading] (assoc heading :heading/show-page? true)) ref-headings)
-        ref-hiccup (hiccup/->hiccup ref-headings {:id encoded-page-name
-                                                  :start-level start-level})
-        page-name (string/capitalize page-name)
         page-name (if heading?
                     (:page/name (db/entity (:db/id (:heading/page (first page-headings)))))
                     page-name)
@@ -60,28 +54,30 @@
         starred? (contains? (set
                              (some->> (state/sub [:config repo :starred])
                                       (map string/capitalize)))
-                            page-name)]
+                            page-name)
+        sidebar? (:sidebar? option)]
     [:div.flex-1
-     [:div.flex.flex-row
-      [:h1.title
-       page-name]
-      [:a.ml-1.text-gray-500.hover:text-gray-700
-       {:class (if starred? "text-gray-800")
-        :on-click (fn []
-                    (handler/star-page! page-name starred?))}
-       (if starred?
-         (svg/star-solid "stroke-current")
-         (svg/star-outline "stroke-current h-5 w-5"))]]
+     (when-not sidebar?
+       [:div.flex.flex-row
+        [:a {:on-click (fn [e]
+                         (util/stop e)
+                         (when (gobj/get e "shiftKey")
+                           (state/sidebar-add-block! :page {:name page-name})
+                           (handler/show-right-sidebar)))}
+         [:h1.title
+          page-name]]
+        [:a.ml-1.text-gray-500.hover:text-gray-700
+         {:class (if starred? "text-gray-800")
+          :on-click (fn []
+                      (handler/star-page! page-name starred?))}
+         (if starred?
+           (svg/star-solid "stroke-current")
+           (svg/star-outline "stroke-current h-5 w-5"))]])
 
      (content/content encoded-page-name
                       {:hiccup hiccup})
 
-     (let [n-ref (count ref-headings)]
-       (if (> n-ref 0)
-         [:h2.font-bold.text-gray-400.mt-6 (let []
-                                             (str n-ref " Linked References"))]))
-     (content/content encoded-page-name
-                      {:hiccup ref-hiccup})]))
+     (reference/references page-name)]))
 
 (rum/defc all-pages < rum/reactive
   []
diff --git a/web/src/main/frontend/components/reference.cljs b/web/src/main/frontend/components/reference.cljs
index c3f22a6a4..b3e60a15e 100644
--- a/web/src/main/frontend/components/reference.cljs
+++ b/web/src/main/frontend/components/reference.cljs
@@ -14,9 +14,13 @@
 
 (rum/defc references < rum/reactive
   [page-name]
-  (let [page-name (string/capitalize page-name)
+  (let [heading? (util/uuid-string? page-name)
+        heading-id (and heading? (uuid page-name))
+        page-name (string/capitalize page-name)
         encoded-page-name (util/url-encode page-name)
-        ref-headings (db/get-page-referenced-headings page-name)
+        ref-headings (if heading-id
+                       (db/get-heading-referenced-headings heading-id)
+                       (db/get-page-referenced-headings page-name))
         ref-headings (mapv (fn [heading] (assoc heading :heading/show-page? true)) ref-headings)
         ref-hiccup (hiccup/->hiccup ref-headings {:id encoded-page-name
                                                   :start-level 2
diff --git a/web/src/main/frontend/components/right_sidebar.cljs b/web/src/main/frontend/components/right_sidebar.cljs
new file mode 100644
index 000000000..a0eea65f0
--- /dev/null
+++ b/web/src/main/frontend/components/right_sidebar.cljs
@@ -0,0 +1,48 @@
+(ns frontend.components.right-sidebar
+  (:require [rum.core :as rum]
+            [frontend.ui :as ui]
+            [frontend.components.svg :as svg]
+            [frontend.components.page :as page]
+            [frontend.handler :as handler]
+            [frontend.state :as state]
+            [medley.core :as medley]))
+
+(defn sidebar-item
+  [block-type block-data]
+  (case block-type
+    :page-ref
+    ["Page reference" (str block-data)]
+
+    :heading-ref
+    ["Block reference" (str block-data)]
+
+    :heading
+    ["Block " (str block-data)]
+
+    :page
+    (let [page-name (:name block-data)]
+      [page-name (page/page {:parameters {:path {:name page-name}}
+                             :sidebar? true})])
+
+    ["" [:span]]))
+
+(rum/defc sidebar < rum/reactive
+  []
+  (let [blocks (state/sub :sidebar/blocks)]
+    [:div#right-sidebar.flex.flex-col.p-2.shadow-xs.overflow-y-auto {:style {:padding-bottom 300}}
+     (for [[idx [block-type block-data]] (medley/indexed blocks)]
+       [:div.sidebar-item {:key (str "sidebar-block-" idx)}
+        (let [[title component] (sidebar-item block-type block-data)]
+          [:div.flex.flex-col
+           [:div.flex.flex-row.justify-between
+            [:div.flex.flex-row.justify-center
+             [:a.hover:text-gray-900.text-gray-500.flex.items-center
+              svg/plus]
+             [:div.ml-2 {:style {:font-size "1.5rem"}} title]]
+            [:a.close.hover:text-gray-900.text-gray-500.flex.items-center
+             {:on-click (fn []
+                          (state/sidebar-remove-block! idx)
+                          (when (empty? (state/get-sidebar-blocks))
+                            (handler/hide-right-sidebar)))}
+             svg/close]]
+           [:div component]])])]))
diff --git a/web/src/main/frontend/components/sidebar.cljs b/web/src/main/frontend/components/sidebar.cljs
index db845a662..00e6a3365 100644
--- a/web/src/main/frontend/components/sidebar.cljs
+++ b/web/src/main/frontend/components/sidebar.cljs
@@ -8,6 +8,7 @@
             [frontend.components.search :as search]
             [frontend.components.settings :as settings]
             [frontend.components.svg :as svg]
+            [frontend.components.right-sidebar :as right-sidebar]
             [goog.crypt.base64 :as b64]
             [frontend.util :as util]
             [frontend.state :as state]
@@ -29,25 +30,25 @@
   (if current-repo
     (let [repos (state/sub [:me :repos])]
       (if (> (count repos) 1)
-       (ui/dropdown-with-links
-        (fn [{:keys [toggle-fn]}]
-          [:a.hover:text-gray-200.text-gray-500.font-bold {:on-click toggle-fn}
-           [:span (string/capitalize (util/take-at-most (db/get-repo-name current-repo) 20))]
-           [:span.dropdown-caret.ml-1 {:style {:border-top-color "#6b7280"}}]])
-        (mapv
-         (fn [{:keys [id url]}]
-           {:title (db/get-repo-name url)
-            :options {:on-click (fn []
-                                  (state/set-current-repo! url))}})
-         (remove (fn [repo]
-                   (= current-repo (:url repo)))
-                 repos))
-        (util/hiccup->class
-         "origin-top-right.absolute.left-0.mt-2.w-48.rounded-md.shadow-lg "))
-       [:a.hover:text-gray-300.text-gray-400.font-bold
-        {:href current-repo
-         :target "_blank"}
-        (string/capitalize (util/take-at-most (db/get-repo-name current-repo) 20))]))))
+        (ui/dropdown-with-links
+         (fn [{:keys [toggle-fn]}]
+           [:a.hover:text-gray-200.text-gray-500.font-bold {:on-click toggle-fn}
+            [:span (string/capitalize (util/take-at-most (db/get-repo-name current-repo) 20))]
+            [:span.dropdown-caret.ml-1 {:style {:border-top-color "#6b7280"}}]])
+         (mapv
+          (fn [{:keys [id url]}]
+            {:title (db/get-repo-name url)
+             :options {:on-click (fn []
+                                   (state/set-current-repo! url))}})
+          (remove (fn [repo]
+                    (= current-repo (:url repo)))
+                  repos))
+         (util/hiccup->class
+          "origin-top-right.absolute.left-0.mt-2.w-48.rounded-md.shadow-lg "))
+        [:a.hover:text-gray-300.text-gray-400.font-bold
+         {:href current-repo
+          :target "_blank"}
+         (string/capitalize (util/take-at-most (db/get-repo-name current-repo) 20))]))))
 
 (defn nav-item
   [title href svg-d active? close-modal-fn]
@@ -187,15 +188,7 @@
      [:a.hover:text-gray-200.text-gray-500
       {:style {:margin-right 13
                :margin-top -1}
-       :on-click (fn []
-                   (d/add-class! (d/by-id "menu")
-                                 "md:block")
-                   (d/remove-class! (d/by-id "left-sidebar")
-                                    "enter")
-                   (d/remove-class! (d/by-id "search")
-                                    "sidebar-open")
-                   (d/remove-class! (d/by-id "main")
-                                    "sidebar-open"))}
+       :on-click handler/hide-left-sidebar}
       (svg/menu "currentColor")]
      (repos current-repo close-fn)
      ]]
@@ -212,7 +205,8 @@
         me (state/sub :me)
         current-repo (state/sub :git/current-repo)
         status (db/sub-key-value :git/status)
-        pulling? (= :pulling status)]
+        pulling? (= :pulling status)
+        right-sidebar? false]
     [:div.h-screen.flex.overflow-hidden.bg-base-3
      [:div.md:hidden
       [:div.fixed.inset-0.z-30.bg-gray-600.opacity-0.pointer-events-none.transition-opacity.ease-linear.duration-300
@@ -291,28 +285,38 @@
             (when (:email me)
               {:title "Sign out"
                :options {:on-click handler/sign-out!}})]
-           (remove nil?)))]]]
-      [:main#main.flex-1.relative.z-0.overflow-y-scroll.py-6.focus:outline-none.sidebar-open
-       {:tabIndex "0"}
-       [:div.flex.justify-center
-        [:div.flex-1.m-6 {:style {:position "relative"
-                                  :max-width 700
-                                  :margin-bottom 500}}
-         main-content]]]
+           (remove nil?)))
+
+         [:a.hover:text-gray-900.text-gray-500.ml-3
+          {:on-click (fn []
+                       (let [sidebar (d/by-id "right-sidebar")]
+                         (if (d/has-class? sidebar "enter")
+                           (handler/hide-right-sidebar)
+                           (handler/show-right-sidebar))))}
+          (svg/menu)]]]]
+      [:main#main.flex-1.relative.z-0.py-6.focus:outline-none.sidebar-open.overflow-hidden
+       {:tabIndex "0"
+        :style {:width "100%"
+                :height "100%"}}
+       [:div#main-content
+        {:style {:width "100%"
+                 :height "100%"
+                 :overflow-y "scroll"
+                 :padding-right 17
+                 :box-sizing "content-box"}}
+        [:div.flex.justify-center
+         [:div.flex-1.m-6#main-content-container
+          {:style {:position "relative"
+                   :max-width 700
+                   :margin-bottom 200}}
+          main-content]]]
+       (right-sidebar/sidebar)]
       [:a#menu.mr-4.hover:text-gray-700.text-gray-500.absolute.hidden
        {:style {:position "absolute"
                 :top 6
                 :left 16
                 :z-index 111}
-        :on-click (fn []
-                    (d/remove-class! (d/by-id "menu")
-                                     "md:block")
-                    (d/add-class! (d/by-id "left-sidebar")
-                                  "enter")
-                    (d/add-class! (d/by-id "search")
-                                  "sidebar-open")
-                    (d/add-class! (d/by-id "main")
-                                  "sidebar-open"))}
+        :on-click handler/show-left-sidebar}
        (svg/menu "currentColor")]
       (ui/notification)
       (custom-context-menu)]]))
diff --git a/web/src/main/frontend/components/svg.cljs b/web/src/main/frontend/components/svg.cljs
index de6f79ff4..3cc09f9ef 100644
--- a/web/src/main/frontend/components/svg.cljs
+++ b/web/src/main/frontend/components/svg.cljs
@@ -29,6 +29,42 @@
     {:d "M7.5 8l-5 5L1 11.5 4.75 8 1 4.5 2.5 3l5 5z",
      :fill-rule "evenodd"}]])
 
+(rum/defc big-arrow-right
+  []
+  [:svg
+   {:fill "none", :view-box "0 0 24 24", :height "24", :width "24"}
+   [:path
+    {:stroke-linejoin "round",
+     :stroke-linecap "round",
+     :stroke-width "2",
+     :stroke "currentColor",
+     :d "M14 5L21 12M21 12L14 19M21 12L3 12"}]])
+
+(rum/defc big-arrow-left
+  []
+  [:svg
+   {:fill "none", :view-box "0 0 24 24", :height "24", :width "24"}
+   [:path
+    {:stroke-linejoin "round",
+     :stroke-linecap "round",
+     :stroke-width "2",
+     :stroke "currentColor",
+     :d "M10 19L3 12M3 12L10 5M3 12L21 12"}]])
+
+(defn- hero-icon
+  [d]
+  [:svg
+   {:fill "none", :view-box "0 0 24 24", :height "24", :width "24"}
+   [:path
+    {:stroke-linejoin "round"
+     :stroke-linecap "round"
+     :stroke-width "2"
+     :stroke "currentColor"
+     :d d}]])
+
+(def close (hero-icon "M6 18L18 6M6 6L18 18"))
+(def plus (hero-icon "M12 4v16m8-8H4"))
+
 (rum/defc caret-down
   []
   [:svg
diff --git a/web/src/main/frontend/handler.cljs b/web/src/main/frontend/handler.cljs
index fb9aacc89..9131f4418 100644
--- a/web/src/main/frontend/handler.cljs
+++ b/web/src/main/frontend/handler.cljs
@@ -990,6 +990,44 @@
       (p/let [_ (clone docs-repo)]
         (load-db-and-journals! docs-repo nil true)))))
 
+;; sidebars
+(defn hide-left-sidebar
+  []
+  (dom/add-class! (dom/by-id "menu")
+                "md:block")
+  (dom/remove-class! (dom/by-id "left-sidebar")
+                   "enter")
+  (dom/remove-class! (dom/by-id "search")
+                   "sidebar-open")
+  (dom/remove-class! (dom/by-id "main")
+                   "sidebar-open"))
+
+(defn show-left-sidebar
+  []
+  (dom/remove-class! (dom/by-id "menu")
+                   "md:block")
+  (dom/add-class! (dom/by-id "left-sidebar")
+                "enter")
+  (dom/add-class! (dom/by-id "search")
+                "sidebar-open")
+  (dom/add-class! (dom/by-id "main")
+                  "sidebar-open"))
+
+(defn hide-right-sidebar
+  []
+  (let [sidebar (dom/by-id "right-sidebar")]
+    (dom/remove-class! (dom/by-id "main-content-container")
+                     "right-sidebar-open")
+    (dom/remove-class! sidebar "enter")))
+
+(defn show-right-sidebar
+  []
+  (let [sidebar (dom/by-id "right-sidebar")]
+    (hide-left-sidebar)
+    (dom/add-class! sidebar "enter")
+    (dom/add-class! (dom/by-id "main-content-container")
+                    "right-sidebar-open")))
+
 (comment
 
   (defn debug-latest-commits
diff --git a/web/src/main/frontend/state.cljs b/web/src/main/frontend/state.cljs
index 05d3d695a..8a3e64327 100644
--- a/web/src/main/frontend/state.cljs
+++ b/web/src/main/frontend/state.cljs
@@ -2,7 +2,8 @@
   (:require [frontend.storage :as storage]
             [rum.core :as rum]
             [frontend.util :as util]
-            [clojure.string :as string]))
+            [clojure.string :as string]
+            [medley.core :as medley]))
 
 ;; TODO: move git/latest-commit, git/status, git/error to corresponding datascript
 ;; dbs.
@@ -45,6 +46,9 @@
 
              ;; encrypted github token
              :encrypt/token (storage/get :encrypt/token)
+
+             ;; pages or headings in the right sidebar
+             :sidebar/blocks '()
              }))
 
 (defn sub
@@ -258,3 +262,16 @@
   (when encrypted
     (set-state! :encrypt/token encrypted)
     (storage/set :encrypt/token encrypted)))
+
+(defn sidebar-add-block!
+  [block-type block-data]
+  (update-state! :sidebar/blocks #(cons [block-type block-data] %)))
+(defn sidebar-remove-block!
+  [idx]
+  (update-state! :sidebar/blocks #(util/drop-nth idx %)))
+(defn sidebar-clear!
+  []
+  (set-state! :sidebar/blocks '()))
+(defn get-sidebar-blocks
+  []
+  (:sidebar/blocks @state))
diff --git a/web/src/main/frontend/ui.cljs b/web/src/main/frontend/ui.cljs
index cb9e7a0a1..a690e89b3 100644
--- a/web/src/main/frontend/ui.cljs
+++ b/web/src/main/frontend/ui.cljs
@@ -154,7 +154,7 @@
 ;; scroll
 (defn main-node
   []
-  (first (array-seq (js/document.querySelectorAll "main"))))
+  (gdom/getElement "main-content"))
 
 (defn get-scroll-top []
   (.-scrollTop (main-node)))
diff --git a/web/src/main/frontend/util.cljs b/web/src/main/frontend/util.cljs
index 057e9abf3..6a43d69cb 100644
--- a/web/src/main/frontend/util.cljs
+++ b/web/src/main/frontend/util.cljs
@@ -576,3 +576,6 @@
 (defn uuid-string?
   [s]
   (re-find uuid-pattern s))
+
+(defn drop-nth [n coll]
+  (keep-indexed #(if (not= %1 n) %2) coll))