unit of measurements

tooltip at top left of screens

this seems to show the grid size function of the zoom factor in viewport

but sometimes it shows the word Chain

what does it means ?

also is there a way to show in N panel dimensions in inches with fractions maybe
don’t seem to find it ?

any good wiki doc on this


A chain is an imperial unit of length (1 chain = 22 yards which happens to be the distance between the two wickets on a cricket pitch). Chains are sometimes used in surveying
You will also see furlongs, 1 furlong = 10 chains

some setting allows to change this tooltip or not

which var allows or not these changes?