You will want to look into pen sets.
You can have separate pen sets for the drawings that you place on the layouts.
You can then set the individual pens in these sets to be what ever colour and thickness you want.
So you can have one pen set for modelling on screen and another for your drawings on the layouts.
In fact you can have as many pen set as you want for different circumstances - but I would keep it simple with just a couple.
Barry.
One of the forum moderators.
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