General

Hit radius Type the number of pixels your cursor can be from the object you want to select.
Select edge loops using mouse scroll wheel This option is OFF by default. When enabled, this allows you to hover over an edge and use the mouse scroll wheel to cycle through the possible loops that include that edge. You can click a pre-highlighted edge loop to select it. If you are using a multitouch machine, you can select edge loops by double-clicking OR double-tapping the first edge of the edge loop you want to select.
Show previous selections with prehighlight hint This option is OFF by default. If it is enabled, SpaceClaim will remember previous selections that were used for some operation. For example, select several faces and moved them. The next time you select one of the faces, the others will prehighlight.