Option for disabled people so Spacebar hold not required for panning

It's impossible for some people with disabilities to hold down spacebar.

(Windows allows "sticky" keys for modifiers like alt, ctrl, shift, but not for spacebar).

The Windows On-Screen Keyboard will also toggle the modifiers' states, but not other keys (like the spacebar).

An on-screen tool for panning would be one option.

Depending on your UX needs, perhaps the option where spacebar would toggle the pan-with-click state.  Or both of these options.

(While you're at it, if you wouldn't mind, please inform your UX/UI people they might like to evaluate the usability of the interface by disabled people -- on-screen-keyboards are one primary tool used by many.)  Thank you very much for your wonderful work.