Revit Tag Leaders: Location, Offset, Gap, Arrowhead and Line Weight
Learn how to adjust Revit tag leader positions, attached and free ends, elbows, gaps, arrowheads, and line weights on MEPF drawings.
On this page
A tag leader has one job: show which duct, pipe, fitting, or valve a label belongs to. When leaders cross each other, bend at odd angles, or stop short of the text with an unexplained gap, the sheet becomes harder to check and harder to build from.
How to fix common tag leader problems in Revit
| Problem | What to do |
|---|---|
| Leader points to the wrong spot | Select the tag, switch the leader to Free End, and drag the endpoint grip onto the element. Confirm the tag is still hosted to that element and not reading a neighbor. |
| Leader is too long or too short | Drag the tag head's move grip. When placing new tags, set the default Leader length before clicking. |
| Leader is bent or crooked | Drag the middle elbow grip to line it up with the tag head, or align the elbow with the tag so the leader runs straight. |
| Gap between leader line and text | Open the tag in Edit Family. A wide label box, hidden linework, or a second label controlled by visibility widens the family bounding box that the leader attaches to. |
| Wrong arrowhead | Select the tag, click Edit Type, and set Leader Arrowhead. To build a custom arrowhead size or angle, go to Manage, Additional Settings, Arrowheads. |
| Leader line too thick or thin | Go to Manage, Object Styles, Annotation Objects, find the tag category, and change Line Weight, Line Color, or Line Pattern. |
Attached End vs Free End
- Attached End. Revit keeps the leader tip locked to the host element and snaps it along the element's geometry as you move the tag. Keep this as your default so the leader cannot drift onto a neighboring pipe.
- Free End. You drag the leader tip anywhere in the view. This helps on crowded fittings or parallel pipes, with one trap: dragging a Free End onto another pipe does not rehost the tag. The tag still reads the original element's parameters. To change which element the tag reads, select the tag and click Pick New Host.
What changed in Revit 2027
Revit 2027 added independent Free Start and Free End controls for tag leaders, along with better snapping on the tag box. In Revit 2026 and earlier, you control the leader end and elbow while the start attaches to the tag family's bounding box.
Why is there a gap between the leader and the label?
When dragging the tag head does not close the gap between the leader shoulder and the text, the cause sits inside the tag family:
- Select the tag and click Edit Family.
- Click the label and check how wide its text box is dragged out. Shrink the label box so it hugs the sample value.
- Turn on Reveal Hidden Elements or check Visibility/Graphics in the Family Editor for invisible lines, reference planes with Is Reference set, or extra labels that are hidden in some family types.
- Load the family back into the project and overwrite.
Test family edits on a sample sheet before overwriting a shared office template, since changing the family bounding box shifts existing leaders across the project.
What building a leader alignment script yourself really costs
- Time. Whoever builds and maintains the script is doing software development instead of the billable engineering and drafting work they were hired for.
- The AI loop.With Claude or ChatGPT it becomes an endless loop of “fix this”, “now fix that”. Each fix can break a case that worked before, and nobody on the team owns the code.
- Cost. Hours spent building and maintaining scripts, times your hourly rate, against $200 per month for RayCAD for the whole company.
You can build a leader alignment script, and this page shows how. For production MEPF sheets, RayCAD is the cheaper and safer choice. Try it free for 15 days.
Frequently asked questions
Can I change the Revit tag leader arrowhead?
Yes. Select the tag, click Edit Type, and set Leader Arrowhead. To create or edit arrowhead styles, go to Manage, Additional Settings, Arrowheads.
Why is my tag leader offset from the text with a gap?
Revit attaches the leader to the bounding box of the tag family, not the visible characters. Open the tag in Edit Family and check for wide label boxes, invisible reference lines, or other family types that stretch the outline.
Can I change tag leader line weight for the whole project?
Yes. Go to Manage, Object Styles, Annotation Objects, find the tag category, and set its Line Weight, Line Color, or Line Pattern. Check Visibility/Graphics if one view overrides it.
Sources
- Autodesk Help, Change the Tag Leader (checked October 21, 2026)
- Autodesk Help, Tag Leader Enhancements in Revit 2027 (checked October 21, 2026)
- Autodesk Support, Leader gaps caused by tag family geometry (checked October 21, 2026)