I'm back with SA 5.0...with so many question also :)
I just tried to make a mosaic with Basic Image Tile Preset. But when I tried to touch up the setting, nothing happen, Except when I change the source of folder image.
And when I see the result, the tile become rectangle; not square. How can I change it ?
If you are saying that you edit a preset, and then you change to a different preset and then go back to the one you edited and the edits aren't there, that would be true unless you save the edited changes you make.
You can of course use the appropriate file : export menu command to save an edited preset.
A quick way to save edited changes to a preset if you don't want to change the name of the preset is to option click the main preset browser icon (option is alt key on windows).