Creating blocks of code from large

Once upon a time I used x-carve and Vectric. Many times I had long 4 - 7+ hours of carve.

Getting a 1F soon and would like to know the best way to create manageable carving time blocks, so that if I were to be needed (daughter called with a flat, etc), I could stop, and worse case only loose an hour of carve time.

example: (1) 4 hour carve becomes (4) 1 hour carves.

I noticed that in the new Elite 1F there was an option to resume after a power loss, etc. and it got me to thinking.