- On the ribbon, click Annotate tab
Dimension panel Dimension . 
- In the graphics window, select the geometry and drag to display the dimension.
- To add a linear dimension for a line or edge, click to select the geometry.
- To add a linear dimension between two points, two curves, or a curve and a point, click to select each point or curve.
- To add a linear symmetric or linear diametric dimension, select two parallel lines or edges, right-click, and then select Dimension TypeLinear Symmetric or Linear Diametric.
- To add a linear foreshortened dimension, select two lines, edges, or points. Then right-click and select Dimension TypeLinear Foreshortened.
- To add a radial or diametric dimension, click to select an arc or circle. Tip: Leader lines of radial or diametric dimensions snap in 15-degree steps. Hold the CTRL key on your keyboard to disable leader line snapping. Then place or move the leader line to the desired position.
- To add an angular dimension, select two lines.
- To add a foreshortened angular or arc length dimension, select two lines, right-click, and then select Dimension TypeAngular Foreshortened, or Arc Length Foreshortened.
- To annotate an arc segment with an arc length, angular, or chord length dimension, click to select the arc. Then right-click, and then select Dimension TypeArc Length, Arc Length Foreshortened, Angular, Angular Foreshortened, or Chord Length.
- To add an implied intersection dimension, select the first curve, right-click, and then select the intersection. Select the second curve that defines the implied intersection, and then select the element (or other implied intersection) to dimension.
Tip: Selected objects in the drawing determine the type of dimension and commands available in the context menu. To change the settings or use different options, right-click, and click a command on the menu. - Click to place the dimension in the appropriate location.
Show Me how to create aligned dimensions
Create aligned dimensions based on each of the following inputs:
- A single line
- Two points
- Context menu selection
Show Me how to create linear dimensions
Create linear dimensions based on the following inputs:
- A single line
- Two parallel lines
- Two points
- A line and an end point
- A line and a mid point
Create linear dimensions based on these inputs:
- A projected intersection and a line
- Two projected intersections
Create linear dimensions based on these inputs:
- Line and circle center point
- Line and circle quadrant point
- Line and circle nearest tangency
- Two circles between tangencies
- Two circles between center points
Show me how to create angle dimensions
Create angle dimensions based on each of the following inputs:
- Two edges to create an acute angle dimension
- Two edges to create an obtuse angle dimension
- Three points
Show Me how to create diameter dimensions
Create diameter dimensions using these context menu selections:
- Arrowheads Inside (On), Single Dimension Line (On), Leader from Center (Off) - Default
- Arrowheads Inside (On), Single Dimension Line (On), Leader from Center (On)
- Arrowhead Inside (On), Single Dimension Line (Off), Leader from Center (Off)
- Arrowhead Inside (Off), Single Dimension Line (Off), Leader from Center (Off)
Show me how to create radius dimensions
Create radius dimensions using these context menu selections:
- Arrowheads inside (Off), Leader from center (Off), Jogged (Off) - default
- Arrowheads inside (On), Leader from center (Off), Jogged (Off)
- Arrowheads inside (On), Leader from center (On), Jogged (On)