Actually "digits after decimal point to show" for volume, area, perimeter & center of mass are hardcoded

That's not the case, which you would know if you read the code before making authoritative statements about the function of that code. Those values always use SI prefixes and they use the same amount of digits after the decimal point as distances do.

Those values always use SI prefixes and they use the same amount of digits after the decimal point as distances do.

At least not center of mass entity use SI prefixes.

Also perimeter area entities follow the state of "use SI prefixes for distances" option.

EDIT: I mean area here, not perimeter. And here is another issue: #639

At least not center of mass entity use SI prefixes.

Fixed in 35c6af4.

Also perimeter entities follow the state of "use SI prefixes for distances" option.

A perimeter is a distance (alongside the contour, that is).

A perimeter is a distance(alongside the contour, that is)

If so, it should also use "digits after decimal point to show: distances", but actually perimeter is hardcoded to 3 digits after decimal point to show.

So, I propose to fix perimeter to follow "digits after decimal point to show: distances" option too.

EDIT: I mean area here, not perimeter.

but actually perimeter is hardcoded to 3 digits after decimal point to show.

Of course it isn't.

@whitequark, Sorry me here, I really mean area in this comment above.