Can we resume a reconstruction calculation after leaving the program?

Can we resume a reconstruction calculation after leaving the program?
I know you can take a break during a calculation. but can we quit the program and resume where we left off?
Because I tried. I thought I saved with the correct option. But when I restarted the program, I couldn’t find how to resume where the calculation had stopped.

Ok.

I have seen the youtube video for that. Thank you