When you’re reading a document, you can hide all the toolbars and task panes to maximize the viewing area on your screen.

The basic reading controls, such as page navigation and zoom, appear in a semi-transparent floating toolbar near the bottom of the window.

• To open Read mode, go to hamburger menu   (Windows) > View, or View (macOS). Then select Read Mode. Alternately, select the Read Mode button  in the floating toolbar.

• To restore the work area to its previous view, choose hamburger menu   (Windows) > View or  View (macOS), then select Read Mode again. You can also select the collapse button  in the floating toolbar.

View PDFs in Full Screen mode

In Full Screen mode, only the document appears; the menu bar, toolbars, task panes, and window controls are hidden. A PDF creator can set a PDF to open in Full Screen mode, or you can set the view yourself. Full Screen mode is often used for presentations, sometimes with automatic page advancement and transitions.

The pointer remains active in Full Screen mode so that you can select links and open notes. There are two ways to advance through a PDF in Full Screen mode. You can use keyboard shortcuts for navigational and magnification commands, and you can set a Full Screen preference to display Full Screen navigation buttons that you select to change pages or exit Full Screen mode.

You can also open the review PDF files in Full Screen mode to keep the focus on the content and the comments you have received. To switch to Full Screen mode, use the keyboard shortcut - Ctrl + L.

Set the Full Screen navigation bar preference

The Full Screen navigation bar contains Previous Page , Next Page , and Close Full Screen View  buttons. These buttons appear in the lower-left corner of the work area.

Read a document in Full Screen mode

If the Full Screen navigation bar is not shown, you can use keyboard shortcuts to navigate through a PDF.

Retain the current state of tools pane in Acrobat Reader

Follow the steps in the article to retain the current state of the Tools pane in Acrobat Reader.

Display size in Acrobat

You can adjust the display size of your PDF for easier reading as per the device you are using. 
Choose the hamburger menu   (Windows) > View. Then select Display Size Mode and choose Small, Standard, or Large as required.
 

Display themes in Acrobat

go to View > Display Theme, 

You can change Acrobat's overall look and feel by setting the display themes. To choose the theme, select the hamburger menu   (Windows) > View or the View menu (macOS), and select Display Theme. Then select one of the themes below:

• System Theme - When you choose System Theme, Acrobat changes the UI as per the OS theme. If the OS theme is changed while Acrobat is running, then Acrobat’s theme also gets updated.
  
• Light Gray - The default theme that Acrobat uses is Light Gray. All the UI elements and the document background appear light gray.
  
• Dark Gray -  Setting the theme to Dark Gray improves visual ergonomics by reducing eye strain and improving screen usage in dark environments – all while conserving battery power. The dark theme is now extended to include the top menu, on-page context menu, scroll bar, and the comments pane.

Preferences for viewing PDFs

The Preferences dialog box defines a default page layout and customizes your application in many other ways. For viewing PDFs, examine the preferences options for Documents, Full Screen, General, Page Display, and 3D & Multimedia.

The preferences settings control how the application behaves whenever you use it; they are not associated with any particular PDF document. To access the preferences dialog, choose the hamburger menu   (Windows) > Preferences  or Acrobat / Adobe Acrobat Reader > Preferences (macOS).

Documents preferences

Open Settings

• Restore Last View Settings When Reopening Documents: Determines whether documents open automatically to the last viewed page within a work session.
• Open Cross-document Links In Same Window: Closes the current document and opens the document being linked to in the same window, minimizing the number of windows open. If the document being linked to is already open in another window, the current document is not closed when you click a link to the open document. If you do not select this option, a new window opens each time you click a link to a different document.
  
• Allow Layer State To Be Set By User Information: Allows the author of a layered PDF document to specify layer visibility based on user information.
  
• Allow Documents To Hide The Menu Bar, Toolbars, And Window Controls: Allows the PDF to determine whether the menu bar, toolbar, and window controls are hidden when the PDF is opened.
• Always use filename as document title: Allows you to use the filename as the document title. (Not selected by default.)
  
• Documents In Recently Used List: Sets the maximum number of documents listed in the File menu.
  

Save Settings

• Automatically Save Document Changes To Temporary File Every _ Minutes: Determines how often Acrobat automatically saves changes to an open document.
• Save As Optimizes For Fast Web View: Restructures a PDF document for page-at-a-time downloading from web servers.
• Always reduce size for files more than 10MB: Reduces the size of the PDF automatically if the file size is greater than 10MB.
  

PDF/A View Mode

• View Documents In PDF/A ModeSpecifies when to use this viewing mode: Never, or Only For PDF/A Documents.

Hidden Information

Searches the PDF for items that may not be apparent, such as metadata, file attachments, comments, and hidden text and layers. The search results appear in a dialog box, and you can remove any type of item that appears there.

• Remove Hidden Information When Closing Document (Not selected by default.)
• Remove Hidden Information When Sending Document By Email (Not selected by default.)
  

Redaction

• Adjust Filename When Saving Applied Redaction Marks: Specifies a prefix or suffix to use when saving a file to which redaction marks have been applied.
• Choose Localization For Search & Remove Text Patterns: Specifies which installed language version of Acrobat to use for the patterns. For example, if you installed both the English and German versions, then you can choose either language for the patterns. The Patterns option appears in the Search and Redaction dialog boxes.
  

Full Screen preferences

Full-Screen Setup

• Current Document Only: Specifies whether the display is limited to a single PDF.
• Fill Screen With One Page At A Time: Sets the page view to the maximum screen coverage by a single page.
  
• Alert When Document Requests Full Screen: Displays a message before going into Full-Screen mode. Selecting this option overrides a previous selection of Do Not Show This Message Again in that message.
  
• Which Monitor To Use: Specifies the monitor on which full-screen display appears (for users with multiple-monitor configurations).

Full-Screen Navigation

• Escape Key Exits: Lets you exit Full-Screen mode by pressing the Esc key. If this option is not selected, you can exit by pressing Ctrl+L.
• Show Navigation Bar: Shows a minimal navigation toolbar regardless of the document settings.
  
• Left Click To Go Forward One Page; Right Click To Go Back One Page: Lets you page through an Adobe PDF document by clicking the mouse. You can also traverse through a document by pressing Return, Shift-Return (to go backward), or the arrow keys.
  
• Loop After Last Page: Lets you page through a PDF document continuously, returning to the first page after the last. This option is typically used for setting up kiosk displays.
  
• Advance Every _ Seconds: Specifies whether to advance automatically from page to page every set number of seconds. You can page through a document using the mouse or keyboard commands even if automatic paging is selected.

Full-Screen Appearance

• Background Color: Specifies the window’s background color in Full-Screen mode. You can select a color from the color palette to customize the background color.
• Mouse Cursor: Specifies whether to show or hide the pointer when Full-Screen mode is in operation.

Full-Screen Transitions

• Disable All Page Transitions: Removes transition effects from presentations that you view in Full-Screen mode.
• Default Transition: Specifies the transition effect to display when you switch pages in Full-Screen mode and no transition effect has been set for the document.
  
• Direction: Determines the flow of the selected default transition on the screen, such as Down, Left, Horizontal, and so on. The available options vary according to the transition. If no directional options affect the selected default transition, this option is not available.
  
• Navigation Controls Direction: Mimics the user’s progress through the presentation, such as transitioning from top to bottom when the user proceeds to the next page and from bottom to top when the user backtracks to the previous page. Available only for transitions with directional options.