Photoshop Creative Cloud- Can't edit photo
I can't see the photo I'm editing using Windows 10.
I can see the file I'm editing in the layers window.
I can also see changes I make to the file in the thumbnail of the active layer (using paint bucket to make parts of it red).
I can see the file is open in the main window.
If I right click on the file tab and select "Move to New Window". I new window opens with a small white rectangle. I can;t sect it or enlarge it.
I tried doing a reinstall but that did't help.
I tried resetting preferences but that didn't help.
Any help would be appreciated.

