You can move, scale, or rotate an image layer relative to its canvas plane or relative to other image layers (if the canvas plane contains more than one image layer).
Choose Windows > Editors > Canvas Layer Editor to open the Canvas Layer Editor.
Select the image layer you want to move, scale, or rotate.
To transform more than one layer at once, link the other layers to the selected one by turning on their icon in the Canvas Layer Editor.
Choose Paint Edit > Modify Layer > Transform Layer from the Palette, or Edit > Transform layer from the Canvas Layer Editor.
A manipulator appears on the active image layer.
Click and drag a manipulator handle to transform the image layer.
When you move the mouse over the manipulator, a context-sensitive cursor shows the current transform mode (move, scale, rotate).
To move only horizontally or vertically, hold the key and move the mouse in the desired direction. You can also use the arrow keys to move by small increments.
To enter exact numerical values, use the text fields in the option box.
Press the Accept button in the lower right corner of the screen to apply the transformations to the layer(s).