Select all the dimensions by pressing Ctrl+A. The dimension
properties color, layer, line width, font and height can be
selected on the toolbar.
For example, the height value is -125. The "-"
sign means that the height is scalable. When the drawing scale is
1:50, the height of the dimension figure on a paper is 125/50= 2.5
mm.
Select a new value from the Height list: -250 (1:50: 5).