Using windows 10 and ms Edge browser on a desktop pc .
As of today when I open Edge browser on my desktop , instead of a full screen view I get a narrow window about 1/4 of the screen opening on the right of the screen . I can not drag it across or widen it with the mouse . I have found that I can get full screen view by pressing F11 key , which is new to me , but then I lose the taskbar at the bottom and the toolbar across the top . Again I have now found that by moving the cursor to the top of the screen I get my toolbar back , but it is temporary and vanishes when I move the cursor . Whilst the home page is in the narrow view it does have the taskbar and toolbar visible .
Everything was fine when I shut down last night , but was changed when I switched on this morning ; I really don't feel it is anything I have accidentally done
Anybody know what has happened ?