How do I measure the height, width, or area of objects in my document?

Upload and open your document in the Lumin PDF editor.

Under Annotate, click Measure.

Set the scale ratio and precision by clicking Add scale.

You can create a custom scale or choose from the available presets.

After setting a scale, hit Save.

Then, you can start measuring by Distance, Arc, Perimeter, Area, Rectangular Area, and Ellipse Area.