The user will have a zoom set in the toolbar
Marquee zoom
Activate the marquee zoom option in the toolbar and use the pointer to choose the area to zoom in.
Fit
Click the indicated icon to choose between fit to page or fit to width for the document(s).
Buttons
Clicking over the -/+ button the document(s) will zoom out or zoom in.
Select from the drop-down list
Another option to zoom documents is to use the drop-down menu, which allows users to zoom in or out between 10% and 6400%.
Alternatively, if a more fine-grained approach is needed, you can also type the exact zoom percentage in this section.
Shortcuts
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Keyboard
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Ctrl/Cmd and “+” to zoom in
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Ctrl/Cmd and “-” to zoom out
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Mouse
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Ctrl/Cmd and “scroll up” to zoom in
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Ctrl/Cmd and “scroll down” to zoom out
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Touchpad
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Pinch in on the touchpad to zoom in
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Pinch out on the touchpad to zoom out
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