Align to Grid is a 'tool' window, which you can leave opened while
working in other windows. Or in technical terms, it is non-modal. This
is the reason it does not have OK/Cancel.
It's similar f.e. to the Control Point table: if you delete control
points there they will be removed from the project immediately.
> Also, if I decided against
> using the "Align to Grid ..." capability, I would expect to see a
> "Cancel" option.
You can use Undo instead.
> After that, would the typical workflow be?
> * Align images
> * Optimize / F5
> * As applicable, remove outlier CP's to improve avg/max pixel errors
> * Re-optimize and repeat removal until satisfactory avg/max
> * Pick projection
> * Create pano
Yes that's a possible workflow.
Joost