The box measures
The dimension separator (semicolon)

Create free angular shapes

Drawing manual shapes
Retouching shapes

Create rectangles
Change the size of the rectangle

Create pre-oriented rectangles in 3D

Draw circles or ellipses
Define the number of segments
Choose the options for the circle in the entity info

Choose the number of segments
Choose the inscribed or circumscribed shape
Choose the polygon options in the entity info

Draw the arc
Draw the arc by 2 points
Draw the arc by 3 points
Draw the portion of Circle

Merge simple shapes to create more complex shapes