Correcting swap size on Linux Mint 19.3 Tricia on HUNSN Fanless Mini PC for dual boot

I installed from my USB correctly and Mint booted up fine. It responded well for a day or so. In learning more about the system I got a message, after taking a snapshot of the system, that I needed more room on my root . In assigning 25 g for the dual boot partition, I gave 16G to root, 4G to home, 6G to swap. With 8G RAM on machine. It worked and as a newbie, I was reading up online to figure out the system. (I used Ubuntu 14 years ago, but had to give up my old machine -- I had some linux experience.)

on a forum site I saw a suggestion to switch swap from 60 to 20 and I followed the directions at the site. When I rebooted the system, Mint would only go to the terminal screen.
I am trying to figure out how to restore swap to the prior setting. Any suggestions?