On the ribbon, go to Tools > Options > Schedule.
The first step is to set up the default time scale increments on the Schedule Options screen. For further information refer to the section on Scheduling. This is a global setting for all workstations.
Time Scale can be set to show time in the schedule in increments from 5 minutes up to one hour.
Default Resource on New Tasks
Default setting is Logged User, which means all tasks created from an object or the Task List will have the default user assigned.
If Unassigned is selected, all tasks created from an object or Task liList will have the user as Unassigned, however, if created from the Schedule under a user's schedule, it will be that user's name in the allocated resource.
For those who work seven days a week, Show Saturday/Sunday as separate columns allows Saturday and Sunday to be displayed in individual columns, rather than combined into one column.
Further information