Although the iPad version of Autodesk's Sketchbook Pro lacks the built-in cropping tool found in other versions of the painting application, you can still accomplish the same thing with a little creative cutting and pasting. It takes a few extra taps and presses, but the end result is the same as if you had used the regular cropping tool.
Tap the Selection tool on the toolbar, and then drag your finger to select the part of the image you want to keep.
Tap the Layers icon to open the Layers panel.
Press and hold the current layer in the panel until the context menu appears, and then select "Cut" or "Copy" from the options.
Tap the "+" at the bottom of the Layers panel to add a new layer.
Press and hold the new layer until the context menu appears, and then select "Paste" from the options. The selection you copied from the original layers appears in the new layer by itself.
Delete the original layer -- press the minus sign and tap "Delete" -- so that you're left with only the cropped image.
Information in this article applies to Autosketch for iPad 2.9. It may vary with other versions.
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