« on: November 30, 2013, 08:57:11 PM »
S & A control snapping. S toggles snapping on and off. A toggles absolute-mode for snapping.
Absolute snapping is snap-to-grid, while non-absolute (relative) snapping is snap-to-fixed steps. So (eg) for an axis-translate, if your initial coordinate was 0.1 and the snap increment is 0.5, absolute snapping would snap to [0,0.5,1.0,1.5,...] while relative snapping would snap to [0.1,0.6,1.1,...]. Basically if you want to nudge something by fixed steps, use relative snapping, otherwise always use Absolute snapping.
To change the snapping stepsize, use the up and down arrow keys. Currently snapping only works for translate and rotate, not scaling.
L & W are the Local and World coordinate systems. World is the grid-aligned canonical coordinate system. Local depends on the object...basically doing full-object Transform tool will modify the Local coord system, and possibly some other tools (I can't remember). Unfortunately this is not spectacularly well-supported yet...