Ctrl

Holding Ctrl will constrain the scale height.

Alt

Holding Alt will constrain the scalewidth. If Alt doesn't work, try Shift+Alt.

Overview

The available tool options for the Scale Tool can be accessed by double clicking the Scale Tool icon.

Affect

The scale can affect the Layer, the Selection, and the Path differently. These three buttons associate the remainder of the options to one of those three elements. Remember that this option persists when you quit the tool.

Transform Direction

Forward (Traditional): The Forward mode will scale the object as one might expect: with an enlarged preview, the object will be rendered enlarged.

Backward (Corrective): Performs transformation in the reverse direction: a reduced object will be rendered enlarged and conversely.

Interpolation

The Interpolation drop-down list allows you to choose the quality of the transformation. For more information about the different methods that can be employed, see the glossary entry Interpolation.

Supersampling

See glossary at Supersampling.

Clip Result

This option will clip the transformated image to the original image size.

Preview

Here, Preview is superimposed on the image. The drop-down list gives you four possibilities:

1. Outline: Puts a frame to mark the image outline, with a handle on each corner. Movements will affect this frame only.

2. Grid: Puts a grid on the image, with four handles. Movements will affect this grid only.

3. Image: Here, the preview is a copy of the image superimposed on the image, with an outline. Movements affect this copy and the underlying image appears.

4. Grid+Image: Both turn at the same time.

Preview type is only for greater convenience. Whatever your choice, result will be the same when you clic on the Scale button in the Scale Informations dialog.

Options with grid activate a drop-list with two options: Number of Grid Lines will allow control over the total number of displayed grid lines. Use the slider to set the number of grid lines. Grid Line Spacing allows control over the distance between the grid lines. Use the slider to set the distance.

	Note
	When scaling a path, Preview options are not valid: only Outline is active.

Constraints

None: No Height/Width constraint will be imposed to scaling.

Keep Height will constrain the scale such that the height of the layer will remain constant.

Keep Width will constrain the scale such that the width of the layer will remain constant.

Keep Aspect will constrain the scale such as the Height/Width ratio of the layer will remain constant.

The Scaling Information dialog window

Figure 8.51.  The Scaling Information dialog window

Original Width/Height

Here, the width and height of the original object are displayed.

Actual Width/Height

Here, you can set width and Height you want to give to the object. The default unit of measurement is pixel. You can change it by using the drop-down list.

Scale ratio X/Y

The origine/actual width/height ratios are displayed here.

Aspect ratio

The actual width/height ratio is displayed here.