I read a similar topic about the combo "Ctrl"+"alt"+ "M" that wasn't working for someone 'cause Google Docs has it's own keyboard combinations but i haven't managed to solve this thing.
I use a tablet and an external keyboard with an American layout(bluetooth) to write documents and pdf. The problem is that even if i use the right combination to obtain "é" ("alt+'+e", "alt+e+e" or simply "alt+e" that on other layouts is "altgr+ key" combination) it just works outside Google Docs. Even while i'm writing this question here i did it easily just pressing those 2 keys, while on Google Docs pressing "alt+'+e = 'e" or "alt+e+e= e", so it's not working.
It works everywhere except for Google Docs and i don't know how to solve it if not doing "é" letter outside, copying it and pasteing it where i need it in the Docs. But it's really annoying.
I also tried to change languages and layout but nothing changed, i think it's a Docs internal thing...what can i do?