Merge pull request #2055 from nodiscc/doc-sticky

doc: usage: document "Sticky" mode

doc/md/Usage.md

@@ -23,6 +23,7 @@ While logged in to your Shaarli, you can add, edit or delete Shaares:
 
 The `Shaare a new link` dialog also allows you to create multiple bookmarks at once (unfold the `bulk creation` section and add one URL per line).
 
+
 ### Tags
 
 Tags can be be used to organize and categorize your Shaares:
@@ -39,6 +40,13 @@ Additional filter buttons can be found at the top left of the Shaare list **only
 - **Only show private Shaares:** Private shares can be searched by clicking the `only show private links` toggle button top left of the Shaares list (only when logged in)
 
 
+### Sticky Shaares
+
+Enabling the _Sticky_ mode on a Shaare will make it "stick" to the top of the Shaares list (first item of the first page), bypassing the normal sort order (most recent first). DIsabling the _Sticky_ mode will move back the Shaare to its initial position on the link list.
+
+Sticky-ing a Shaare does not bypass active filters/search terms.
+
+
 ### Permalinks
 
 Permalinks are fixed, short links attached to each Shaare. Editing a Shaare will not change it's permalink, each permalink always points to the latest revision of a Shaare.