Change properties of several objets at once

[Hubert Tonneau <hubert tonneau pliant cx>]

What anybody would expect for changing the properties (let's say the ground
color) of serveral objets would be to select all the objects, then get the
properties dialog through the double clic, make changes, press 'apply'
button and get changes applied to all selected objects at once.

Yeah, but nearly no, including dia, drawing software is working that way.
Really sad.
Ok, it may be non trivial if the selected objects are not all the same kind,
but if they are, is it so hard to implement ?

On the other hand, congratulations for this really good piece of software
... that can provide native -> PostScript conversion through the command
line, which is so important ... and also so rare.