If you want to deduct the edge thickness you need to set your cutting lit options in polyboard to Net dimensions. This is to be found in the menu “cutting list” / cutting list options.
Now polyboard will export all panels without including the edge band
I have transfered cut list from polyboard to opticut, I press it to optimize, Im getting cut list but it doesnt deduct edging for exm. My door is 798mm edging from left and right is 1.3mm So my cut should be 795.4 +- but opticut generates 798 not the one i need.