- The Edit Witness Lines tool allows users to add additional dimension(s) to end of dimension a string.
- Select the dimension string
- Select the Edit Witness Lines button from the ribbon
- Select an element to add a dimension to
- Pick in space to end command
- The Edit Witness Lines tool allows users to remove (combined) dimension(s) in a dimension string.
- Select the dimension string
- Select the Edit Witness Lines button from the ribbon
- Select on the element that you wish to remove the extension line from
- Pick in space to end command
Grip Edit Option:
- Selecting the middle Grip Dot on a dimension string extension line allows users to remove a dimension at the end of a dimension string.
- Select on the dimension string
- Select on the middle Grip Dot on the extension line (and Hold pick button down)
- Move extension line to element that second extension is on and let go of pick button (it’s a simply drag and drop)
- Selecting the middle Grip Dot on a dimension string extension line allows users to combine dimensions in the middle of a dimension string.
- Select on the dimension string
- Select on the middle Grip Dot
- Drag dot to the element extension you line to combine
- The Tab key allows you to pre-select a dimension that you then can select to delete.
- Move your curser (mouse) to the dimension line you wish to delete from the string
- Press the tab key to pre-select the dimension
- Select the dimension and delete
Thank you for reading. For more information on the software solutions, training and consulting Ideate provides, please visit the Ideate, Inc. homepage.

Eugene O’Day, IX
AEC Senior Application Specialist
Eugene A. O’Day, IX, with more than 25 years of architectural and mechanical experience, offers a trained focus on all things Revit and BIM. Teaching is a passion of his. Eugene has been an instructor in undergraduate degree programs, has traveled worldwide teaching Autodesk solutions to major corporations, has taught at accredited ATCs throughout the Northwestern region, and is a frequent and popular instructor, speaker, and presenter for AUGI® CAD Camps, Revit – and related product user groups. He has also been a trusted public school district advisor on new drafting instructor hires. At Ideate, Eugene provides training and support for Revit Architecture, Revit Structure and AutoCAD. Eugene is also a Revit Architecture Autodesk Certified Professional.