When you want to move matches to a different date or time. You can select a bunch of matches at the same time, drag and drop them all.
Go to Surfaces Scheduler (Menu > Manage > Schedule/Charts > Surfaces Scheduler)
Find the matches you want to select.
Hold Ctrl while you create a box over the matches with your mouse.
Once they are selected, they are outlined in white.
You can now grab them, drag them and drop them.
*Tip: Click on Generate Schedules > choose the league > Options > See schedules (This will show the entire schedule for that league)
Hard to understand right? Here is a video.