Doug,
I deleted you second post.
To answer your question:
I could not find any pattern in how multiple elements are selected. The Info Box always displays the settings of the LAST selected element. Therefore you can select a bunch of elements, then click an element of the selection to deselect it and click it again to re-add it to the selection.
This way the Info Box will display the settings of that element.
Interestingly, ALT-clicking (picking up the parameters of) the element will not make the Info Box change what it displays. So I guess it is in what order elements are added to the Selection Set and that is why the above trick works: the deselected and reselected element becomes the last element added to the selection set.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
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