The Sketching category includes:

The Common Grid Defaults category includes:

There are six unit-specific Grid Defaults sections:

The unit length reflects the current selection. The grid defaults for meters is displayed by default. Changing the unit length will not change the list of grid defaults in the dialog box, although the choices for each default will change depending on the unit length selected. Detailed below under the grid defaults are the default settings based on the unit length selected.

In each Grid Defaults category there are four options:

Note that each plane has its own grid settings, so you can set each plane's grids differently. The grid settings in the Options dialog box define what the default grid settings are for each new plane created. The Grid Defaults category includes:

Usage Examples

Grid Snaps per Minor in the Settings group allows you to specify intermediate snap locations between minor grid lines (1-1000). You can use this to reduce the density of the grid display, while still snapping to a tighter grid. For example, in millimeters if the Major Grid Spacing is set to 10, you can set the Minor-Steps per Major to 5, and the Grid Snaps per Minor to 2. This way, minor grid lines are displayed every 2 mm, but snapping is still to every mm.

Another way to use this function is to set this to a value such as 100 or 1000. This way, sketching does not appear to be snapping to a grid, but it actually is and the coordinates of your sketching are being snapped to 1/100th or 1/1000th of your minor grid line spacing. For example, if the minor grid lines are every inch and the Grid Snaps per Minor are set to 100, when sketching a point its coordinates will end up as numbers such as 8.36 or 5.27 instead of 8.357895846483938474 or 5.27123934933421 with no grid snapping at all.