I likely would as well if I remembered it. I have always had a problem recalling key combinations across all the applications I use which is why I rely on context menus and tool bars heavily. I've called out VSCode on this a few times as well as it is a memorization fest to work efficiently in there without proper toolbars. It's not just this but I have memory issues in general which have only gotten worse as I've aged. Easy discoverability / access in UI design is a big focus for me.

when I discover a new key-combo I write it on a postit at the bottom of my monitor, lives there for a while until it sticks in my brain.

In VSCode, use Ctrl+Shift+P to bring out the command palette and type in your wish. The corresponding shortcut is also displayed.

Yep, but I find it to be a really poor paradigm for efficient work if you don't remember them. Having to search the command palette is much slower than being able to set up a toolbar of often used functions. Don't get me wrong, the command palette is great to have but if you can't memorize all those functions then it's a really poor replacement.

For efficiency Key combo > toolbar > command palette. I just hate to be forced into #3 because #2 doesn't exist. (not to mention that the developers make crazy arguments in the forums about why they refuse to impliment it... but that's all off topic)

If you use Windows, newer versions (v1809 and newer) have win+shift+s as a neat region-select screenshot tool that sends the image to your clipboard.