Figure 13.111. The Shear tool in Toolbox
Shear tool is used to shift one part of an image, a layer, a selection or
a path to a direction and the other part to the opposite direction. For
instance, a horizontal shearing will shift the upper part to the right and
the lower part to the left. A rectangle becomes a diamond. This is not a
rotation: the image is distorted. To use this tool after selecting, click
on the image or the selection: a grid is possibly surperimposed and the
Shearing Information dialog is opened. By dragging the mouse pointer on
the image you distort the image, horizontally or vertically according to
the the direction given to the pointer. When you are satisfied, click on
the Shear button in the info dialog to validate.
Figure 13.112. Shear example
You can't shear both ways at the same time, you have to use the
shear tool twice on end.
4.7.1. Activating the Tool
You can access to the Shear Tool in different ways:
Figure 13.113. Shear tool options
Normally, tool options are displayed in a window attached under the
Toolbox as soon as you activate a tool. If they are not, you can access
them from the image menu bar through
→ → which opens the option window of the selected tool.
Transform Direction; Interpolation; Clippping; Preview
4.7.3. Shearing Information
Shearing Information window
Shear magnitude X
Here, you can set the horizontal shearing amplitude. A positive
value produces a clock-wise tilt. A negative value gives a
counter-clock-wise tilt. The unit used by shearing are
Shear magnitude Y
As above, in the vertical direction.