I have a simple 4 image landscape panorama that won't seem to stitch properly.
When I assemble the 4 images, the outcome is very distorted. the horizon is curved significantly rather than flat.
When I try to use the straighten tools, they do not work. The tutorial shows how to straighten the horizon with the vertical line tools but they do not correct my problem. The tutorial also shows the dotted yellow horizon line but they do not show up when I use this tool:(    I must have a setting set incorrectly but I can't seem to fix my problem.
Thank you in advance for any suggestions you can provide.

kcflyrv