Ah -- I'm an idiot (well, I knew that but I sure hate to prove it).

The solution is on the far right, in the Modify/Node box (yeah, REAL intuitive).

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

I MUST be missing something obvious, but I can't find any way to mass uncheck items (so they don't display any more).

This is an absolute must have feature, so I'm sure it's there somewhere but I can't find it (and the manual is no help).  If I have a few hundred items to uncheck it's just impossible and ridiculous to do each one at a time (but I find this to be the case on a lot of models I import, particularly from SKP files, where I have no way of importing them otherwise -- with an OBJ file I'd just open them up elsewhere and use reasonable tools for this job).

Someone save my fingers!

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley