you'll do that the same way as you change the colour of your model. But make sure that you are in youre sheet when you change it. (Follow the following steps
- make sure that you are working in your sheet (NOT model)
- Press 'Settings' - 'Color Table'
- Right under you will see a rectangle with a 'B' in
- Dubbelklick on that
- choose another colour
- Press 'OK'
- Press 'Attach'
The colour of your sheet normally has changed.