Hello,
Many photobuyers consistently search for "horizontal" or "vertical" among keywords.
How about a box, say, under the word "Keywords", on the "IPTC info for.." and the "IPTC Stationery" panels, that could be blank, or marked "H", or "V"? Entering "H" or "V" would automatically enter "horizontal" or "vertical" into the keyword field, and vice versa, and the feature could be applied to a batch via the Stationery Pad.
Not only would it be quicker and less liable to error than typing "horizontal" or "vertical", or forgetting to click the word across from Master to Current Keywords List, but the marked box would affirm correct orientation to each image when performing a quick final IPTC check on a group of images.
Thanks,
Paul Skelcher