To rotate the image a specific amount click on the rotate button and for parameter you would use the following formula.
{+-}{#}{><}
+ = positive degrees
- = negative degrees
# = number of degrees
> = width is greater than height of image
< = width is less than height of image
If an images width were greater than its height and you wanted to rotate it positive 45 degrees you would use this
Parameter
If an images width were less than its height and you wanted to rotate it positive 45 degrees you would use this
Parameter
Next click where it says Press here to (transform) your image or (reset) the form.