picture rail, horizontal strip of velcro round the room, blutack, etc.
If youre more determined you could embed some steel in the plaster and
fit the pics with magnets. Depends on the app really, you dont say why
and therefore how much effort is worthwhile to achieve your ends.
Pegboard is a butt ugly option.



Ahh - our posts crossed...

Magnets - now there's a thought...

I would need to do some calculations re the pull offered up by these
rare earth magnets vs. the heaviest picture I might hang...

Excellent idea - thanks very much.

I will investigate and fantasize a little more :-)

Roy