- About - แสดงไดอะล็อกบล็อค ระบุเวอร์ชั่นของ AutoCAD ; และหมายเลข serial numbers
- Aperture - Controls the size of the Object Snap "OSNAP") target box -- should set to 7
- Arc - Draws an arc. The default method of drawing arcs is selecting three points (so-called "3 point arc"), which are the two endpoints of the arc and some other point along its locus. Other methods of drawing an arc can be specified by three letters, such as SEA, which means "Start Point, End Point, and Included Angle."