No setting to hunt for every time, no shortcut to remember
Turn on SeventyPlain once: from then on, anything you copy with formatting (bold, colors, fonts) arrives plain when pasted, anywhere. Nothing to repeat on every copy-paste, nothing to remember.
Download the free SeventyPlain trial (7 days, macOS 13+).
Some apps (TextEdit, Pages) offer "Paste and Match Style" from the Edit menu or ⌥⇧⌘V. It works, but you need to remember it every time, and many widely used apps (browsers, chat apps, code editors) don't offer it at all.
Another common habit: paste into TextEdit's plain text mode or into Notes first, then copy again from there. It works, but it adds two extra steps every time, and it's easy to miss a hidden bit of formatting in the result.
Get SeventyPlain: set it once, and it's handled everywhere.