rescaling

Choose the "rescale" tab to access this function. Resizing your image using rescaling, unlike retargeting, will treat each pixel of your image exactly the same. Rescaling works similarly to the resize functions of many image editing programs. To rescale, simply drag the handles on the sides of the image until the image is of the desired scale.

Hold down the
Shift key on your keyboard while rescaling to maintain the proportions of your image:

You can also specify exact dimensions for the image by typing new pixel values into the
Width and
Height fields in the submenu:

Hit
Enter on your keyboard to apply the changes. If you click the
Maintain Proportions checkbox before you enter in a pixel value, the image will be rescaled by the original proportions of your image.
Starting over. If you want to undo your rescaling changes, click
Reset.
Because the original image is modified when you rescale, if you go back to
retarget mode, any seams you had previously calculated will be reset.