On the web:
Simply go to the flowsheet of the patient whose template you wish to change. Hover over the selection bar on the right hand side, and select "Change Template".
From here, you will be able to select a different template and start time:
To change a template from the iPad, you will now find "Change Template" under menu as it's own designated item, as seen below:
To change a patient's current template from the iPad:
Go to "Edit Mode" choose "Menu"
From the drop down menu choose "Change Template"
Here is a video where Dr. Ivan clearly explains the "Change Template" functionality: