This article will go over how to change settings in your calendar tab.   Please note that you can also find this page by going to the Calendar tab and clicking on the Calendar Preferences link to the right of the page:  

1 - Click on the Admin tab - look for the Global Settings section - click on the Calendar Preferences bubble - then click on the Manage Calendar Preferences link.

2 - Once you click on the Calendar Preference link the next page will appear.

3 - From this pop up page you can change the following:

Monthly View Settings:

Order View Settings:

Menu View Settings:

Customer View Settings:

Default Calendar View Settings:

Calendar Week Start On Settings:

Marketing Calendar Settings:

Calendar Default View Settings:

Calendar Colors for Orders/ Quotes/ Activities and Custom Order Types Settings:

4 - Remember to press save when making any changes.