HOW TO HIDE THE COMMAND DIALOG IN CATIA V5?

I assigned the letter A for the command to create a plane, but when I did, it showed A on the command dialog below the toolbar. I really want to hide the command dialog. Can you help me?
I assigned the letter A for the command to create a plane, but when I did, it showed A on the command dialog below the toolbar. I really want to hide the command dialog. Can you help me?
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