Problem: In my current slide show, a number of the slides have a distracting white element to the far right.
Question: Must I open PSE7 and crop each of the slides, one-by-one?
Answer: No.
Solution:
--In Edit>Effects, drag the Crop effect to the first of the errant slides
--click Properties, then adjust the edges of the crop as desired
--click Apply
--right-click that first slide and click Copy
--drag-loop (correct term?) all the suceeding errant slides to select them
--right-click the selected group of slides, then click Paste Attributes and
--voila! all the errant slides are instantly adjusted