range.bars in stl

On Wed, 13 Apr 2005, antonio rodr?guez wrote:

In stlmethods(stats) says:

For informatively, in the help for plot.stl:

range.bars  logical indicating if each plot should have a bar at its
right side which are of equal heights in user coordinates.

I don't understand the meaning of: "which are of equal heights in user
coordinates"

Plot it and see.  The bars each cover say 100 units on the y axis.