The options, selectable on this screen are only valid if your licence key includes Scheduling. If you don't have Scheduling enabled in your Jim2 key, you will receive the following warning.
On the ribbon, go to Tools > Options > Schedule.
You will first need to set your default schedule time scale increments on the Schedule Options screen. For further information refer to the section on Scheduling.
Time Scale allows you to show time in the schedule in increments from 5 minutes up to one hour.
For those who work seven days a week, Show Saturday/Sunday as separate columns allows Saturday and Sunday to be display in individual columns, rather than combined into one column.
Further information: