When I open a CorelDraw file with many pages, it takes me a while to scroll all the way the bottom to access the Master Page.
So I have to, each and every time, collapse the pages to save time.
This also makes it easy for me to switch back and forth through the document I'm working on.
Video here to better explain https://icecreamapps.com/v/gdkybx5
I know how annoying this is. I usually just type "mas" in the search box on the top of the object panel (or in the page view) and it brings me to the master page. without collapsing everything or scrolling. But it would REALLY be good to have a "Collapse All" option on that screen.