Why does this image change when I change orientation?

For some reason, if I change the orientation to horizontal my image (the bottom black gradient) changes:
This is how it should look (horizontally ofc):

This I show it looks:

was your gradient “properties” set from “top” or something like 300 pixels from the middle line/label

if so i may have gone “below” the whole horizontal page,

you might want to change your gradient to align to the bottom of the view