How to measure distance on a PDF
Set the page scale, select Dimension, and click two points. Deta displays the real-world distance between them.
Updated
Find the tool
DimensionM
Left toolbar → Dimension (ruler icon)
Before you start
Set or calibrate the page scale. Use a known dimension to check it before measuring an unlabelled distance. You need permission to add markups.
Steps
- Select Dimension in the left toolbar, or press M.
- Click the start point of the distance you want to measure.
- Click the end point. Deta creates a dimension and displays its length using the page scale.
- Switch to Select (V) and select the dimension to adjust its endpoints. The value updates with the line.
- To change the label's units or precision, follow Set measurement units and precision.
Zoom in before placing endpoints on a dense drawing. Press Esc to cancel an unfinished dimension.
Check your result
Measure a known span first. In the walkthrough, the dimension across Bedroom 1 reads 12'-0", matching the printed 12' span. Allow for endpoint placement and the chosen precision when comparing measurements.
A dimension measures a straight distance. For the full length around a room, use the perimeter guide.
Troubleshooting
- The value is wrong: check the scale on this page, then check both endpoints. Changing the zoom is not calibration.
- The label shows words instead of a measurement: clear the dimension's Custom Text in the properties bar to restore the calculated value. Editing label text does not calibrate the page.
- The value is too rounded: open Scale → Drawing Units and choose a finer Length Precision.