The image will initially appear quite ragged since
this is only a "Preview" adjustment. You can "fine-tune"
the adjustment as require. Once satisfied that the verticals are accurate
simply press the "Return" or "Enter" button on the
keyboard, the adjustment is applied.
There are of course quicker ways of gaining access
to the "Perspective" tool, but in this Tutorial I was trying to
make use of as many keyboard and menu functions as possible, so that the
you may become more familiar with the myriad of options available.
Of course now that we have our verticals fixed we
can begin the real work of removing dust marks, and in the case of this
image, builders equipment, but thatís for another Tutorial
The Reichstag - Berlin