First off, please forgive if this has been anwsered or I'm breaking convention. I'm new to Drupal and am posting this after several hours of research. So I have tried!
I've got a new clean install of D7. A clean install of adaptive theme and a freshly created unmodified subtheme.
The first thing I'm trying to do is establish my page width and sidebar widths. I have settings of 960px page width and 250px width sidebar 1 and 220 px width sidebar 2.
No value I set seems to affect the theme's layout. I've tried changing units, I've tried going wider and narrower, but I get essentially a default layout regardless. I can control some of this via css but I want to rely on theme settings.
Have I completely overlooked some rudimentary step in getting this setup? For the life of me I can't figure out where!
Thanks for your patience and help.