Straighten

You can horizontally align pictures that do not have right or left tilt.

Steps

To level a tilted photo

Open the photo that is not level.
Click Edit > Straighten.
In the Straighten window, place your mouse over the vertical ruler and move it up or down until you level the photo.
Click Apply.

More Information

Straighten Dialog Box

Rotation Angle

The default is set to 0.0 and adjusts the slope value from -179.9 ° to 180 ° in 0.1 ° increments. Negative values tilt the picture to the left, positive values tilt the picture to the right to level.

Reset Button

You can reset the photo in its original angle.

Apply Button

You close the window and apply the rotation value to the photo.