How having a blank template page to allow fetarured

Hello guys !
I’ve developped a theme from underscores so that I’m able to have just all I need.
But cannot have an empty page to allow BB working.
I’ve created a template page and disallow get-sidebar, get-header and get-footer… but doesn’t work émoticône frown
Have you find a solution to have a fullwidth template page (with absolutely nothing, blanck émoticône smile to allow BB working and creating all the configuration you want ?
Thanks for your help

Duplicate entry -