Line

Draws a line by specifying the 2 end points.

You can use Straight Snap, Object Snap and Construction lines to assist in placing the line.

Use Distance constraint or Angle constraint to draw a line of a particular length or angle.

Polyline

Draws a polyline which is a curve made up of multiple joined line segments.

You can use Edit/Separate to break a polyline up into individual lines.

While drawing the polyline, undo can be used to remove the last picked point.

Control points

Draw a freeform curve using control points.

The line through the first and second point defines the starting tangent direction of the curve, and the line through the last 2 points defines the ending tangent, so you may want to place the second and second-to-last point with care to control the exact starting or ending direction of the curve

If you want the curve to come to a sharp point, check the "Make corner point" checkbox, or hold down the Ctrl key when clicking.

When drawing the curve, undo can be used to remove the last picked point.

Through points

Draw a freeform curve that is forced to pass through the points that you pick.

This can be useful if you want to force the curve to go through a particular spot, but this can also easily introduce wiggles in the curve. Using control points is generally preferred since it will create a more relaxed curve.

If you want the curve to come to a sharp point, check the "Make corner point" checkbox, or hold down the Ctrl key when clicking.

When drawing the curve, undo can be used to remove the last picked point.

Sketch

Draw a freeform curve using a click, hold down, and drag method like a brush stroke.

The curve will close automatically if your stroke comes nearby the start point.

If you want to draw many sketch curves in a row, use the Repeat checkbox.

Corner

Draw a rectangle by specifying the 2 corner points.

Move the mouse near a 45 degree angle to get a square snap.

Options are available for entering a specific width and/or height. For quick keyboard entry of width or height, it is not necessary to actually click anywhere. Just start typing and your keystrokes will go to the width box, and push Tab to move to the height box. Press Enter when you are finished with the height.

Checking the "Rounded corners" option will allow you to specify a radius for the corners of the rectangle after the 2 corners have been picked.

Center

Draw a rectangle by specifying the center and a corner point.

Options are the same as Rect Corner above.

3 pts

Draw a rectangle using 3 points, 2 points for one edge and then a 3rd point for the width.

When picking the 3rd point, Square snaps are available to form an exact square.

Other options are the same as Rect Corner above.

Center

Draw a polygon from a center and radius point.

Distance constraint can be used to specify an exact radius.

Edge

Draw a polygon by specifying 2 points along the polygon's edge.

Distance constraint can be used to control the length of the edge.

Star

Draw a star shaped polygon by center and radius points.

Style:Auto will draw one using the classic proportions, switching to Style:Custom allows specifying a third point to define the inside radius.

Center

Draw a circle by center and radius.

Click on the Radius label with the small arrow to switch between entering radius or diameter.

The Vertical checkbox will flip the circle 90 degrees to point vertically up from the plane.

Diam

Draw a circle by specifying 2 diameter points.

The Vertical checkbox will flip the circle 90 degrees to point vertically up from the plane.

3 pts

Draw a circle by specifying 3 points on the circumference.

Tan

Draw a circle of the specified radius tangent to 2 existing curves.

The first 2 points must be picked snapped on to existing curves. The third point determines the radius by the distance between it and the second picked point, or a specific radius can be typed in.

Center

Draw an arc by center point, start point, and angle.

The Elliptical option can be checked to create an elliptical arc that passes directly through the final picked point.

Cont

Draw an arc that continues tangent from the end of an existing curve.

The first picked point should be nearby the end of an existing curve

3 pts

Draw an arc that passes through the 3 picked points.

The order of the picked points can be changed using the Style option.

Tan

Draw an arc of the specified radius tangent to 2 existing curves.

The first 2 points must be picked snapped on to existing curves. The third point determines the radius by the distance between it and the second picked point, or a specific radius can be typed in.

After the radius has been specified, an additional click is required to specify which of the 2 arc choices you want to keep. Click close to the half you want.

Center

Draw an ellipse by center and 2 axis points.

A specific width and height for the full ellipse can also be entered.

Diameter

Draw an ellipse by 2 diameter points followed by a point for the second axis.

Corners

Draw an ellipse by specifying the 2 corner points for its bounding box.

Point

Draw a single point object.

Point objects can be used to place a marker somewhere that can easily be snapped back to later on.

Helix

Draw a helix or spiral type curve.

Two points are picked to define the central axis and length of the helix. After the axis is defined, the next pick defines the start radius. If you want to have a different radius at the end for a tapered effect, check the Tapered option before finishing the first radius.

After the radius has been defined, you can adjust options for the number of turns of the helix, or the pitch which is the distance traveled by one coil.

If you want to draw a completely flattened 2D spiral use the "Flat spiral" option that shows up after the first point has been picked. That will cause the first point to become the center of the 2D flat spiral.