Straighten an image or layer using the Straighten tool.
To rotate with the Straighten tool:
To straighten a layer (rather than the whole image), click the layer name on the Layer palette.
On the Tools toolbar, click the
Straighten tool 
. A straightening
bar with end handles appears on the image.
Click and drag each handle of the straightening bar to align it with the part of the image that you want to be straight.
On the Tool Options palette, choose from these options:
Auto Paint Shop Pro automatically straightens the image based on the position of the straightening bar.
Make vertical Rotates the image to make the straightening bar vertical.
Make horizontal Rotates the image to make the straightening bar horizontal.
Angle To choose a specific angle for the straightening bar enter a value with the numeric edit control.
Crop image To crop the edges of the image to make it rectangular after straightening, mark the check box. Clear this check box to fill edge areas with the background color.
Rotate all layers To straighten all layers in the image, mark this check box.
To apply the command, double-click
the image or click Apply 
.