Viewbase - Different colours, linetypes, lineweights etc inside viewports

Dear Bricscad and Forum!

I made a 3D model for a small piping modification.
In the model psace i made 3 layer which is grey for architecture, black thin line for the existing piping, and bold lines for the parts which are modified.

If i use the viewbase command the viewports all the same colour and linetype, lineweight which shows the existing new part, architectrue the same way.

Is there an easy way to, like some plotting setup or something, to show the difference? Otherwise i can't show the modified parts and the change of existing parts.

Thank you for your help,
Orosz Robert