On Windows, it's now faster/easier to use the built in Snip+Sketch tool (Win + Shift + S). It does instant rectangular selection, then pops up a simple editor

On Windows, it's now faster/easier to use the built in Snip+Sketch tool (Win + Shift + S). It does instant rectangular selection, then pops up a simple editor which you can then copy/paste anywhere you'd like. I have Win+Shift+S bound to a mouse chord, as well as copy and paste, so I can actually paste an arbitrary rectangle of my screen without touching the keyboard.