Board Thread:Support Requests - Designing Your Wiki/@comment-46725388-20200909020445

Hi! I made a wiki and I want a custom background. I watched this video and I tried to download gimp but it is not compatible with my device apparently. I tried googling the address to wear it has a link to download another app you can use for that but that didnt work either. Does anyone know any apps that give me the ability to do custom backgrounds that are compatible with a chromebook?  