CAD Entities
Polyline
Polylines consist of multiple straight line and circular arc segments.
Polylines are used internally to represent toolpath shapes as they correspond well to gcode G1 (line) and G2,G3 (arc) moves.
Properties

Note Polylines with first and last points having the same coordinates are not necessarily closed. The closed marker should
be set to 

This property contains a collection of polyline points. Clicking the [...] button to the right of the property will open up a window where the points can be edited directly. Each point contains an X,Y and Z coordinate and a bulge parameter. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
Region
A region consists of a closed outer shape and a number of internal holes.
To create a region, select inner and outer shapes then use the Edit  Convert  To Region menu option, or press CTRL+R
Circle
Properties

The coordinates of the center of the circle. 

The diameter of the circle. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
PointList
Point lists are useful for defining points to be used for drilling operations.
As well as drawing directly, they can be created from the DrawPoint List menu operations
Divide Geometry 
Evenly divides a selected shape into a given number and inserts a point at each division. This is useful for generating a bolt hole pattern. 
Step Around Geometry 
Inserts a point at given distances around a selected shape. 
Fill Geometry 
Fills a closed shape with points. 
Offset Fill Geometry 
Fills a closed shape with points where alternating rows are offset by half the stepping distance. 
Centers 
Inserts a point at the center of each selected object. 
Extents 
Inserts a point at the extremities and center of a boundary rectangle enclosing each selected object. 
Properties

This property contains a collection of points. Clicking the [...] button to the right of the property will open up a window where the points can be edited directly. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
Rectangle
Properties

This will round the corners of the rectangle to a given radius. 

The height of the rectangle. 

The coordinates of the lower left corner of the rectangle. 

The width of the rectangle. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
Text
Properties

Bold Font Style. 

This option scales the width used for each character. The default is 1. A setting of 2 would double the space used for each character (but not the character itself). 

This is the name of the font to use for the text. 

This is the text height in drawing units. The height is based on the em square, which is a property of the font that describes the largest dimensions possible of the font. To obtain an accurate height, given the text and font entered, the Edit  Resize command should be used. 

Italic Font Style. 

This scales the distance between each text line. The default is 1. 

This is the first and at the moment, only alignment point. The TextAlignmentH and TextAlignmentV options are all relative to this point. 

Regular Font Style. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

The text to enter. To enter multi line text, click the [...] button after this property. 





A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
Arc
Properties

The center of the arc. 

The radius of the arc. 

The start angle in degrees of the first arc point. Angle = 0 is along the positive X axis. 

The sweep angle in degrees from the first to second arc point. Positive angles are counter clockwise and negative angles clockwise. 

A general purpose, multiline text field that can be used to store notes or parameter data. 

A 4 x 4 matrix of numbers used for general transformations of the drawing objects. The transform matrix can be used for rotations, translations and scaling about all 3 axis. 
Line
Lines have multiple segments, similar to polylines, but can only contain straight sections.
Surface
Surfaces are triangle face meshes imported from STL and 3DS files.
Spline
Splines (or NURBS) are curves that are defined by a series of control points and weights.