Cursor, Polylines, or Lines Keep Snapping to Small Blue Squares

Issue

The cursor wants to snap to little blue squares in your drawing (and you don't want it to). Or you're drawing polylines or lines, and they're snapping to the blue squares.

You may be having this issue while:

• Placing blocks, such as plants, irrigation equipment, site amenities, etc.
• Drawing a line or polyline

If you hover your cursor over one of the blue squares, AutoCAD may identify it as a 3D vertex.

Cause

This issue is probably occurring because you have a tool called 3D Object Snap (3DOSNAP) turned on, which is causing your lines and polylines to snap to these vertices.

This issue is common in drawings that contain splines. More information about splines and why we don't recommend using them

Solution

To get rid of the blue squares, turn off 3DOSNAP by either:

• Pressing the F4 key (Windows keyboard) or fn + F4 keys (Mac keyboard), or
• Typing 3DOSNAP in the Command line, pressing Enter, and selecting Disable (Note: This option is not available with F/X CAD.)