Choose the Apple menu > System Settings.
In line with the new macOS guidelines, we've revamped the Acrobat scrolling framework for Mac in the September '23 release. Transitioning from NSView to NSScrollView, this foundational shift affects the Mac user interface behavior. It offers a modern scroll experience that appears while in use and eliminates extra space needs. Key changes include:
Split view update: To view the PDF in Split mode, navigate to Windows® > Split. The earlier method of accessing split from the top of the vertical scroll bar is discontinued.
Horizontal scrolling: Users with a scroll-enabled mouse must combine the Shift + mouse wheel for horizontal scrolling.
Page dimensions display: Previously located at the far left of the horizontal scroll bar, you can now view page dimensions by hovering your mouse over the lower-left corner of the page.
Steps to enable the scroll bar in Acrobat or Acrobat Reader
You can enable the scroll bar to appear consistently in Acrobat or Acrobat Reader by performing the following steps:
Step 1: Adjust the scroll bar appearance in macOS settings
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Select Appearance in the side bar.
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Choose Show scroll bars > Always.
Step 2: Turn on the preference to always show scroll bar
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Select Acrobat > Preferences.
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From the Categories on the left, choose Page Display > Always show scroll bars.
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Select OK.