From the "Job Checklist" screen open the list of rooms by pressing on the downward arrow on the left of the "Rooms" bar.

To amend the rooms list press the "Paper with Pencil" icon to the right of the Rooms heading bar. Once this icon is pressed a "+" icon will appear towards the right of the Rooms heading bar.

• Select the  "+" icon to add a room. 
• Once pressed a pop up screen opens with a list of room templates. 
• Select the required template by pressing on the arrow to the right of the template name.
• 
  
• Once the required template has been selected, type in the room name and press "Confirm". 
• The new room will be added to the bottom of the rooms list. 

Once you have made all of the required changes to the rooms list press on the "Paper with Tick" icon to accept the changes.

Screenshots below for the sequence of screens.