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Grokking The Gimp
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2.6.2.4 Layer Resizing

As with scaling, a layer can be resized smaller or larger. This is done with Layer Boundary Size,  found in the Layers menu. Typically you resize a layer to a smaller dimension to eliminate undesirable parts. However, resizing a layer smaller has the same problem as resizing an image. That is, the subject matter of the layer must be properly positioned within the resulting layer boundaries. For images, the positioning problem was solved using the Crop tool, but this will not work for resizing layers. Fortunately there is a simple procedure that produces the same effect and allows for the interactive positioning of the layer contents within the smaller layer boundaries.

Figures  2.19 and 2.20 illustrate

  
Figure 2.19: Resizing a Layer Smaller: Floating a Rectangular Selection
Figure 2.19


  
Figure 2.20: Resizing a Layer Smaller: Anchoring the Float to a New Layer and Deleting the Old Layer
Figure 2.20

how this is done. The method consists of a four-step procedure:
1.
The region to be framed in the layer is selected with the Rectangle Select  tool (see Chapter  3 for more on selections). Figure  2.19(a) shows how a rectangular selection has been made in an image window.
2.
The selection is then converted to a floating selection using the function Float  from the Image:Select menu or by typing C-S-l in the image window. Figure  2.19(b) shows the Layers dialog after the selection has been converted to a float.
3.
The floating selection is then made into a new layer by choosing the New Layer function in the Layers menu or by clicking the New Layer button in the Layers dialog. Figure  2.20(a) shows the Layers dialog corresponding to this step.
4.
The old layer is made active, as shown by the Layers dialog in Figure  2.20(b), and is deleted by clicking on the trash can icon in the button bar.

The result of resizing the layer smaller is shown in Figure  2.21.

  
Figure 2.21: The Resulting Resized Layer
Figure 2.21

In Figure  2.21(a) the layer has been resized smaller, which can be seen by the black-and-yellow dashed layer boundary. Figure  2.21(b) shows the resulting Layers dialog. The procedure, as described, allows the layer contents to be carefully positioned within the resized layer.

Although there are good reasons to resize an image larger, it is difficult to imagine a good reason for resizing a layer larger. However, due probably to a rationale of symmetry, a layer can be resized larger. It should be noted that, as for layer scaling, the GIMP does not allow a layer to be resized to dimensions larger than the window boundaries of an image. To resize a layer larger than the current image boundaries, the image must first be resized to accommodate it.

Grokking The Gimp
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  Published under the terms of the Open Publication License Design by Interspire