Swap arrows symbol ⇄

Windows

Tap Copy above, then press Ctrl+V where you want ⇄.

Windows has no built-in shortcut for it. In Microsoft Word, type 21C4 and then press Alt+X.

Mac

Press Control+Command+Space, search for “swap arrows” and double-click ⇄.

That shortcut opens the Character Viewer, which has every Unicode symbol.

iPhone

Tap Copy above, then touch and hold where you want ⇄ and tap Paste.

To type it from the keyboard, open Settings › General › Keyboard › Text Replacement, tap +, paste ⇄ as the Phrase and add a Shortcut.

Android

Tap Copy above, then touch and hold where you want ⇄ and tap Paste.

To type it from the keyboard in Gboard, open Gboard settings › Dictionary › Personal dictionary, tap +, paste ⇄ and add a shortcut.

Linux

Press Ctrl+Shift+U, type 21c4, then press Space or Enter. This works in most GTK and IBus apps.

Word and Google Docs

Word: type 21C4, then press Alt+X.

Google Docs: open Insert › Special characters and search for “swap arrows”.