To zoom IN on all contents of the window you're working in, click the Zoom In option under the View menu at the top of the window
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OR
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Press Alt++ (Alt+Shift+=) on your keyboard for PCs or Option++ (Option+Shift+=) for Macs.
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To zoom OUT on all contents of the window you're working in, click the Zoom Out option under the View menu at the top of the window
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OR
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Press Alt+- on your keyboard for PCs or Option+- for Macs.
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To return to the ACTUAL SIZE on all contents of the window you're working in, click the Actual Size option under the View menu at the top of the window
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OR
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Press Alt+0 on your keyboard for PCs or Option+0 for Macs.
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​Note that in the Drawing Tool, the drawing canvas can be zoomed independently from the Drawing Tool window.