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Next to the Rotation Angle parameter, type in a new value and pick the Apply button.Go to the Modify tab, then the Properties panel, and select the Family Types button.Press the Modify button to make sure that nothing is selected.Flex the geometry to make sure that the Reference Line rotates as desired.Pick the OK button to exit the dialog box. Just make sure that you maintain consistency with names.) Select the Instance option if you desire the angle to vary for each instance occurrence of the family inside a project. (This can be any name that you desire, such as Swing Angle for a door. In the Parameter Properties dialog box, type “ Rotation Angle” in the Name box.Go to the Options Bar (typically at the top of the screen), and select from the Label option. Choose the reference plane that will make sense to the final user when they specify an angle in the future. The actual Reference Plane that is selected is very important, as this will dictate the angle that is specified by the user in the parameter that will be created in the next step.Place the dimension by picking the Reference Line and the desired Reference Plane.From the Annotate tab, and the Dimension panel, select the Angular command.Create a Rotation Angle parameter that will adjust the Reference Line to the desired angle.

Locking the single Reference Line endpoint to BOTH Reference Planes ensures that the intersection will be the rotation base point for the Reference Line.

After locking the Reference Line endpoint to the vertical Reference Plane, repeat the same process to lock the same Reference Line endpoint to the horizontal Reference Plane.

This will actually lock the endpoint to the vertical Reference Plane.

Select the Lock button that appears after aligning the endpoint.

The dot represents the endpoint and is the 2 nd key to getting the rotation to work correctly. After moving the cursor over the endpoint of the Reference Line, you may need to press the TAB key a few times to cycle through available options until you see the dot appear at the endpoint.

Select the endpoint of the Reference Line.From the Modify tab, and the Modify panel, select the Align command.Align and lock the endpoint of the Reference Line to the Reference Planes.Draw the Reference Line starting at the intersection of the two Reference Planes and extending the Reference Line at an angle away from the intersection.From the Home tab, and the Datum panel, select the Reference Line option.( The information shown in this illustration is applicable to other family templates, but the Generic Model.rft template provides me with a clean template to illustrate the rotation topic.) While the Revit family template that will be used to create your specific family will vary depending on the family requirements, I will use the Generic Model.rft template for this illustration.Start a family using the appropriate template.Let’s take a look at the steps to accomplish the 2 keys just mentioned above. Many users have difficulties because they fail to do both of these key steps. The other key is to lock the Reference Line endpoint to the intersection of two Reference Planes that represent the rotation point of the rotating item. When creating a rotation angle, the first key is to use a Reference Line instead of a Reference Plane. This technique can be used on door swings and other items that need controlled by a rotation parameter within the family. It seems that getting rotation angles to work correctly is something that is battled by many family creators, so in this article, I’ll give you the keys to getting that rotation angle to work correctly. A door swing is the most common example of this, as most Revit Architecture users want to be able to specify the swing angle of the door panel. Many Autodesk Revit families need to have a portion of the family be able to rotate depending on parameters in the family.