Many ways as described above.
If you have a 'Print and Cut' machine and want to contour cut text shapes for example, I reverse print on this media, 3M 8518 or Arlon 3200 as these have the clear'ish backing, so when laminated in White, just turn over and you can see the finished print, great for seeing where to trim.
Set up your graphic with the usual 'Crop' marks when printed, and when it's had some time to cure, place some low tack app tape / masking tape just over the 'Crop Marks, careful not to go into the print area.
Run your print through your Laminator using compatible White film with clear adhesive.
Then carefully cut around the edge of the taped area, not going right through, just the top White laminate media...then peel off showing the original printed 'Crop Marks'.
You can then set up the job in the Printer the usual way for contour cutting....you will know at the end if done correctly
I have used this method many times with success on my Roland VP-540
Hope this helps.