Not too hard to guess what was intended, or mentally change "show" to "shows"The <erroneous hotlink> at the right of the dialog show how each of the primary colors...
On page 113, it says:
This chopped sentence, however, leaves me with bated breath, wondering what it is I6. You can expand the dynamic range of the image by selecting the
can select, since I don't see any likely candidates in the Color Balance
Dialog itself.