Grouping layers objects together

Hello - I was given a PDF file to see if I could laser it. The issues I’m having is when I imported it . It created 14 layers and they are all sitting on top of each other and none of the layers are grouped. Extremely difficult to select all the lines one by one to group them so I can move them as one. Any help would be great

Shift click on the layer you want in the Cuts/Layer window and it will select everything on that layer.


Is it a multipage PDF?
If so, there are tools to split the PDF in several files with one page per file.
Or open it in Inkscape and see if you can export from there.