We are about to help one of our (become well-established) Members, Granny Sue, to walk through her first Timeshift restore process.
As a background to this, if you wish, you can read her Thread here
Now, with myself being a multi-multi-booter, I have Timeshift snapshots coming out of my proverbial backside, so I'm choosing the drive I have that is least
populated with Linux currently - only 8 of the suckers, and showing you some screenshots from there, and I hope Sue can provide me with similar.
This is from my 256 GB Solid State Drive in the Dell, that is /dev/sdb
SCREENSHOT 1 - WIZ'S TIMESHIFT SUMMARY PAGE - SSD
Mine are all full screenshots, taken on demand (Tag O) and with comments (makes my work easier).
Yours may comprise one full snapshot, taken by schedule or on demand, and followed by one or more incremental screenshots, scheduled or on demand.
We are currently on v19.08.1 of Timeshift, although some Linux Mint users may have the previous version, v19.01. With v19.01, Tony George introduced a safeguard that provided you had comments on a screenshot, it would not be captured in the culling process you may have set, to delete old snapshots after a certain timeframe.
So if your Linux Distro has a version older than 19.01, be sure you upgrade. Click the hamburger Menu at right, and About, to see your version.
You can where my cursor is pointing, to Settings, and that is where we are headed next.