How to add and edit working hours

To add working hours, click on My Calendar under My Stuff on the side menu. From there, click on Working Hours. 

A pop-up will then appear where you can add and edit working hours. Use the checkboxes to indicate which days you are available. 

You can also add built in breaks, to do so, click on the + icon next to the times. Once it is showing your updated hours, click on Ok.