inbox attachment transparent

how to make incoming news box transparent ? Greetings to everyone on this forum, I respect

i use base skins , I've made some improvements on it, just a few shortcomings

solved by mr flut thanks

@GaNgSta LoVe could you tell me how you solve it?

Documents\Sports Interactive\Football Manager 2023\skins\fm23BaseTrans\panels

drop into panels folder , refresh theme

Thank you so much.