Filling holes in your schedule before filling an empty day is easy and by changing your 'Open Day Rules' you get to decide how much Gazelle favors 'Open Days' vs. 'Days you are already on the road'.
NOTE: Any day you are available for scheduling where you currently have nothing scheduled is considered by Gazelle to be an 'Open Day'.
FROM THE WEB APP
Step 1: Go to Scheduling > Scheduling > My Policies
Step 2: Edit your "Open Day Policy"
Step 3: Save.
FROM THE MOBILE APP
This setting can only be changed by logging into the Web App at this time.