Hi again Hugues, yep seen that... Fn-Delete on the MacBook to clear the red shapes.
I'm just trying a free scan at the moment, but for small objects it's more time consuming.
The other niggly thing, is my alignment keeps drifting, and although I select three point, the resultant model ignores the moves sometime, and I have to start the scan again as it's corrupted. Im on my fourth attempt, and can't get past five consecutive passes/scans so far...grrr. Last time I saved each, I'm[ported into Meshlab and used their alignment, that's how I knew it wasn't so bad. However, all this stuff is a learning curve.