I don't know about you, but I don't re-flash my keyboard enough to ever remember where I put the bootloader. Sometimes its the last thing I think about in a refactor and I end up cornering myself into a place where I cant get into that layer anymore. I've started putting hardware switches on my newer builds, but some older builds don't have a hardware one, so it requires disassembly and jumping the microcontroller. Even when I have one though, I gotta flip my board over and its annoying sometimes, so I prefer to have a keystroke for it.

Two Hand hold down #

What I've landed on recently is the idea of a two hand hold down combo for the bootloader. These combos are ones that there is no way I can hit without picking my hands up from their normal homerow position and pressing four keys simultaneously with pointer and thumbs.

Here are some example layouts from keymap-editor

screenshot-2025-09-17T01-06-16-427Z.png

40% layout - similar to corne

screenshot-2025-09-17T01-05-02-298Z.png

Here it is on my Son's 3x5 macropad

screenshot-2025-09-17T01-05-30-687Z.png

Here it is on my 3x3 macropad

Timing #

You can even give it a long prior timeout to really make sure that its not an accidental hit.

screenshot-2025-09-17T01-10-22-100Z.png