How Do I Change A Worked Shift To Not-Worked (Or Vice-Versa)?

Find the shift you wish to change. Click the pencil button in the top-right corner of the shift. Then If you wish to set the shift as Not-Worked click the 'X' button that appears on the shift.

Alternatively if you wish to set a Not-Worked shift to Worked simply click the pencil button then click the checkmark that appears in the top-left corner of the shift.