Snap Options
You can set snapping options for sketching and editing solids. Units for snap options are set by your Units options for all new documents.
Note: If you try to enter a value that is out of the allowed range in
the Options panel or the SpaceClaim Options dialog, you will see
a red exclamation mark icon next to the field. You can hover over the icon to see a
tooltip that will explain the valid values for the option.