virtual box 16 4 Widescreen screen size

I’ve been searching for this answer without success for a while.

Thanks to AskUbuntu I finally have a solution ­čÖé

Shutdown your virtual box and in a terminal shell type the following command:
VBoxManage setextradata global GUI/MaxGuestResolution 1366,768
the 1366,768 is just what i have set for my screen resolution on my laptop, change this to whatever your current resolution is on the machine your running. This should maximize all screens to full 100% on all guest os’s