Mail Client Rules Window Issue I am using Mac OS X 10.12.5 with the Mac Mail client Version 10.2 (3259).   When I try to add a new rule to account in Mail, the part of the rule where the action to perform on the email is not fully expanded for some odd reason. Here is an example



As you can see, where it says Perform the following actions is just showing a horizontal line instead of the dropdown where you would normally select what action you want to have the rule perform. 

I have tried to change my resolution to every setting allowed by my monitor, but it does not seem to change the rules dialog.

I just checked my existing rules that i have added to the Mail client, and all of those rules are showing up the same way :( 

Any idea how I can fix this issue with the Rules dialog in the Mail client?
I’ve found quitting and reopening Mail to be the quickest reliable fix.  It’s been a known issue for years, persisting through several major Mail upgrades. 

I eventually got tired of hearing myself cuss at it and wrote a Service which quits and returns to the rules prefs window with a keyboard shortcut.