diff --git a/Help.md b/Help.md
index 8594637..c59a372 100644
--- a/Help.md
+++ b/Help.md
@@ -19,6 +19,8 @@ Bouquin supports various keyboard shortcuts:
 - **Ctrl+Shift+S**: Open Statistics
 - **Ctrl+Shift+D**: Open this documentation page
 - **Ctrl+Shift+R**: Report a bug
+- **Ctrl+Shift+L**: Lock the screen immediately
+- **Ctrl+Shift+U**: Unlock the screen
 - **Ctrl+Q**: Quit the application
 
 
@@ -75,6 +77,8 @@ There is also a 'Diff' tab which will show all the differences between the curre
 
 You can click on 'Revert to Selected' to revert to an older or newer version of the page. Your current version will still be in the database, so you can always revert 'back to the future' if you change your mind :)
 
+If you wish, you can also select one or more revisions and click Delete to delete them (you cannot delete the latest revision).
+
 ### Autosave vs explicit save
 
 Every 10 seconds, Bouquin will autosave the page if there were any unsaved changes. This will be given the note 'autosave' in the version history.