Close Mame Interface into Retroarch

Hi, I'm new here and I have a question.

I am a Mame (retroarch) user. When I press the "Esc" keyboard shortcut, the mame interface (the default one with green and blue colors) appears buggy (blinking). I would like to lock the Mame interface when I click the Esc key.

Thank you for your help.

Don't use Retro on a PC. Get the official version of MAME here for the PC. https://www.mamedev.org/

Or go ask retroarch for help here. https://www.retroarch.com/

You won't get any help here.