To measure an object, choose COMMENT > Measure, then choose the measurement tool you wish to use:
How to use the Measure Tools in PhantomPDF While you have many options for measuring in PhantomPDF, the tools are very easy to use. These tools are especially useful when you’re creating manuals, instructional guides, forms, and computer-aided design (CAD) drawings-or when you want to measure areas of any document before sending to a professional printer. Foxit PhantomPDF makes it easy to measure distances and areas of objects in PDF documents with our “Measure Tools”.