Hello - can someone please assist me in getting middle mouse button to Set SHOWEVERYTHING?
Middle mouse button does nothing, double click or single click.
Also please note the preferences description seems truncated for the penultimate checkbox.
The screenshot is too small to read so I can't tell if it's what you're already using, but the command you want is either:
Set SHOWEVERYTHING=Toggle
or
Set SHOWEVERYTHING=On
Depending on exactly what you want to happen.
(It's better to upload images to the forum rather than 3rd party image hosts. They mess things up and then take all their images down to break old threads on top of that. )