Doubling the size of the Calendar will make it twice as high, which allows for more precise scheduling.
Edit Settings/Calendar and double the size of the Calendar
Change your Calendar start and end times
To change the size of the Calendar, go to Settings/Calendar.
Put a check mark in [ ] Double Size Calendar. Setting it makes the calendar twice as high, which allows for more precise scheduling.
This is a company-wide setting, not a per user setting.
To make the Calendar more practical to your hours, you can change the start and end times. If you don't start your day before 9 AM, change the start time closer to your actual start time.
If you end your day at 7 PM, change the end time closer to 7 PM.
Note: Any appointments that start before the start time or end after the end time will not appear in the Calendar. However, they will appear in the Mobile app, Sales > Work Orders page, in the customer’s account and in Reports > Service Appointments.