We will now get into the basics of photo editing. But there is always more to learn about photo editing should you be interested.
To do this, click on “rotate arbitrary” (the icon outlined in red here) in the menu area.
A new window will open. In this window you can enter by how many degrees you want to rotate the photo.
Align the photo using the grid. Alternatively, you can simply move the blue pusher to the left and to the right.
A white grid is placed over the photo, which you can use to align the horizon.
The photo is not rotated to the right as a whole: rather, it rotates in on itself to the right.