Am 25.05.2013 18:49, schrieb Jean-Marc Lasgouttes:

What is the difference between having the checkbox unchecked and having it 
checked but leaving the
width empty?
As I wrote in my commit most box constructs need a width. The checkbox allows you to decide not to use a given width and, more important, informs you that you have for some box constructs a choice between an explicit width and no explicit width.

regards Uwe

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