Fixes tilted picture(s) in a horizontal plane.

1. In ALSee Photo Editor, go to [Tool] -> [Rotate] -> [Horizontal Alignment] or click [Horizontal Alignment] tab on the left.

2.  Use the slide bar to adjust the degree of rotation that fits with a horizontal plane.

3. For more detail editing, you may adjust the gap size for each horizontal/ vertical grid line. Choose a Grid Line Color by clicking the color picker.

3. Click [Horizontal Alignment].