I'm new to Roll20, but not new to games, the problem I seem to be having is that, when I make a page and change the units to 30 x 20, it snaps back to the 25 x 25 if I add an object or move anything. Is there a lock page function that I am missing? And secondly if I scroll up the page to get the entire work area in view, the page adds about 4 to 6 rows of units to the grid and I am just confused.