This feature adapts the length values of all axes to the same values in another unit, either from mm to inch or the other way round. Thereby, it scales the selected parts equally in all three dimensions, effectively changing its size. For example, by choosing Inches to mm, an object with a length, height and width of 100.00 mm will grow to 100.00 inches. Choosing mm to Inches, the conversion is conducted the other way round, with parts with the size of 100.00 inches getting a size of 100.00 mm. This feature can be helpful when files were saved without length units by other CAD programs and the part is then loaded using the wrong scale.