Differences Between Snap Types

This will make your objects snap to:

Points, ends and middles of lines, corners on polygons, centres of spheres, model location points, animation path segments

This will make your objects snap to:

Anywhere on a line, anywhere on a polygon, anywhere on an animation path. Will also snap to points.

Basically anything that’s not a distinct point, but still an object. Remember that models are treated as single point objects.

This will make your lines attempt to snap perpendicular to other lines, animation paths, and polygon edges. Will also snap to points. Not as reliable as other snap methods.

This will make your objects snap to the grid, and only the grid. Will not snap to points.

This is on by default

This option is unique in that it can be combined with other Snap options. This will make objects snap to the ground plane and to surfaces. Without this, objects will be placed at a Z value of 0. Usually best left on, but sometimes you may want a model to take air, or an animation path to go below the ground plane. In this case, turning it off will prevent adjusting the handles resetting your models elevation, pitch and roll.

Ortho-Lock and Aspect-Lock

Not a type of snap, but similar types of functions.

Ortho-Lock will force all lines and animation paths strictly along the X axis or Y axis exclusively. This is superseded by the snap options above except Snap to Surface.

Aspect-Lock will force the circle and square tools to have the same x and y dimensions. It will create perfect circles and squares.