The Builder interface does not save the location / size of the window based on each element, but it automatically remembers the size and position of the last nib window and uses this when opening future nib files. For example, if I open the nib file A, change its window position, and then close the IB, and then open the nib B file, its nib window will appear with the same location / size that I set for the nib file.
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