CAD > Snap > Grid Snap

Snap to a rectangular grid. No pick-box is displayed at the intersection of the cursor cross-hairs.

All cursor movement will be constrained to the grid points.

The grid can be oriented in either the X-Y, Y-Z or X-Z planes at any desired spacing and location. To set up these parameters use

CAD > Snap > Cursor/Grid Setup   setup the cursor/grid spacing and orientation.

For an example on the use of grid snap mode in model building refer to

Freehand Sketching - Room and Pillar.