How do I change the viewable time increments on my Calendar in Redtail CRM?

With Redtail's Calendar, you have the option to set your viewable time increments in 15 minute, 30 minute or 60 minute slots.  

To set these, go to your Preferences: 

The second section you'll see on the Preferences page is Activity Management: 

Click inside the Default Calendar Time Slots box to select from your available options: 

After selecting your desired Calendar Time Slots, click Save Preferences in the upper right hand corner of the Activity Management section and you will have successfully changed these.