I'm trying to generate a strip map with a north to south orientation. Every time I try to create a strip map for this polyline I get pages in landscape orientation. I would like to have a portrait orientation as my layout for the final product. I've tried changing the page orientation to vertical with no luck as well.Any ideas on how I can fix this issue.
Data driven pages strip maps seem to want to be horizontal rather than vertical. You can trick it by making your page settings Landscape, create your strip map grid, then revert to Portrait to create the data driven pages.
Alternatively (and possibly the "right" way to do it) is to set the Length Along the Line and Length Perpendicular to the Line in the tool. If you check Use Page Unit and Scale and then switch the values in those two Length fields, it will produce the strip map in the orientation you desire.
To me the Page Orientation field sounds like the one that you need to change to get the desired output, but in my testing I haven't seen that field make a difference in the strip grid.