I'm assuming you are using an old version (2020 R1 or earlier) and you are referring to this in the XactMeasure dialog?
It is for specifying a reduced material boundary size and is very rarely needed. You should only enter a value if there is a reduce material boundary specified on your drawing, in which case it would override the natural material boundary. I have only ever seen a handful of drawings that specify a boundary size so in 99% of cases, that field should be blank.
I'm assuming you are using an old version (2020 R1 or earlier) and you are referring to this in the XactMeasure dialog?
It is for specifying a reduced material boundary size and is very rarely needed. You should only enter a value if there is a reduce material boundary specified on your drawing, in which case it would override the natural material boundary. I have only ever seen a handful of drawings that specify a boundary size so in 99% of cases, that field should be blank.
