[hibbelig]

I believe the default for Ctrl-1 is to go to the first space.

But what I meant is to hold down the spacebar, then hit 1, and to make that be the same as hitting the F1 key. Because with a touchbar, there is often no F1 key, or you have to look to find it.

The Karabiner Elements profile called SpaceFN has the spacebar do double duty: If you hold it down and then press another key, then it acts as a modifier (like shift and ctrl and cmd). If you just hit the spacebar itself then it acts as the normal space key.