Merge pull request #343 from AY2425S1-CS2103T-F12-1/ug-known-issue-ui…

…-bug

Add known issue - unused space

docs/UserGuide.md

@@ -504,7 +504,9 @@ To allow more flexibility in the input format, we have to sacrifice some validat
 
 1. **When using multiple screens**, if you move the application to a secondary screen, and later switch to using only the primary screen, the GUI will open off-screen. The remedy is to delete the `preferences.json` file created by the application before running the application again.
 2. **If you minimize the Help Window** and then run the `help` command (or use the `Help` menu, or the keyboard shortcut `F1`) again, the original Help Window will remain minimized, and no new Help Window will appear. The remedy is to manually restore the minimized Help Window.
-
+3. **There is an unused space below the command history box**. 
+![unused space](images/UiUnusedSpace.png)<br>
+As shown in the screenshot above, marked by the red box. This will be fixed in the next version.
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 ## Command summary