Scale::read refused number format arrays of more than one unit (feet and inches) and the /F, /T formats, so measuring inside an Acrobat-calibrated viewport failed and such saved measurements were listed as unsupported. Read them into Scale::formats, label readings with them (whole units, then the rest as decimals, a fraction, rounded or cut off; a last unit that rounds up carries) and write them back when a measurement is added with that scale. Single-unit decimal scales read and label exactly as before.
jonathanwxh-cell
87d8deaced