If your thumbail image doesn’t reflect the design as you would like, there are a couple of ways to change it to something more useful.
Make a copy in the workspace, make it HUGE, then move it just outside the printable area. My passthrough slot hold-down pins are down on the bed, but I put a couple of massive copies above the printable area, and the thumbnail shows those nicely:
I add to many of my designs the text “CUT” - which sits between the colours I use for engrave and the colours I use for cutting. ('cos if you put them in order of increasing Redness they come out in that order on the UI - I’ll do a post one day)
It used to sort of work that way, whatever the last image you uploaded would turn into the thumbnail, so you could upload a jpg of your final design…but that went away easily 3+ years ago. In it’s place we got the abilities update the thumbnail so it shows the current art in there (and sorting, and a few other things).
