diff --git a/Help.md b/Help.md
index 0846b38..706fc7d 100644
--- a/Help.md
+++ b/Help.md
@@ -82,6 +82,7 @@ In the File -> Settings dialog, it is possible to:
  - **Remember the encryption key**. Doing so means that you aren't prompted for it at startup (**WARNING**: this means the encryption key is written to the application settings on the disk! It could be exfiltrated by various means if the filesystem is accessible to an attacker. Only check this option if you are not concerned with this risk.)
  - **Change the encryption key**. This will prompt for a new passphrase and will re-encrypt the database with that passphrase.
  - **Configure the auto-lock timeout**. The default setting is to lock the notepad if it has been idle (no key presses) for 15 minutes, after which time you must re-enter the password. You can set to 0 (Never) to turn off the auto-lock feature.
+ - **Compact** the database. This runs the SQLite3 command `VACUUM` against the database, which can de-fragment it and reduce its size.
 
 ## Export options