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If you are looking to resize images, this article should be useful. For desktop users, find information on changing resolution and document size.
Use Image > Image size to change the dimensions of the image in pixels, its resolution, or the document size.
This change directly affects memory usage, quadrupling it if you double the pixel size. Due to memory requirements, there is a 8192 x 8192-pixel upper limit on image size for the 64-bit version.
In the toolbar, select Image > Image size.
In the Image Size window, do any of the following:
Increasing the resolution increases the memory size of your file.
Tap OK.
Since there is not a specific image resizing tool, like in the desktop version, to resize an image use Transform and with two fingers, pinch or expand. See 2-finger gestures.
Since there is not a specific image resizing tool, like in the desktop version, to resize an image use Transform and with two fingers, pinch or expand. See 2-finger gestures.