grin

I noticed this behavior, too. Setting my Pen button to Pan/Scroll lets me only pan vertically, not horizontally in Photo and Designer. The function Tumble does the trick though. In Photoshop and Illustrator it's the other way around. Pan/Scroll let's me scroll and move in all directions, whereas Tumble doesn't seem to do anything. Would be more intuitive, if «Pan/Scroll» could interpret the direction of the Pen movement.

Please consider the option to apply Master Pages not only to document pages, but also to other Master Pages. Use case: Create one Master Page A with the most basic elements for the whole document, then create other Master Pages B, C, D based on A with layout variants for certain pages.