I need to import an .asc file on PADS LAYOUT 9.5 but I'am not able because PADS ask to increase number of layer.
The .asc file have 6 layer but my default layer mode have only 2 layer.
How to change default mode on pcb layout to import this file?
I think you need to switch to extended layer mode before importing the .asc file:
Setup > Layer Definition
Click on 'Max Layers...' button