If in the body of the file list, extend the selection by adding the next row above or below the selected row

`Shift` + `Arrow Up` / `Shift` + `Arrow Down`

All hotkeys for Adobe Acrobat Pro (Windows)

Navigation - Navigating a PDF Previous Screen	`Page Up` / `Shift` + `Enter`
Navigation - Navigating a PDF Next screen	`Page Down` / `Shift` + `Enter`
Navigation - Navigating a PDF First page	`Home` / `Shift` + `Ctrl` + `Page Up` / `Shift` + `Ctrl` + `Arrow Up`
Navigation - Navigating a PDF Last page	`End` / `Shift` + `Ctrl` + `Page Down` / `Shift` + `Ctrl` + `Arrow Down`
Navigation - Navigating a PDF Previous page	`Arrow Left` / `Ctrl` + `Page Up`
Navigation - Navigating a PDF Next page	`Arrow Right` / `Ctrl` + `Page Down`
Navigation - Navigating a PDF Previous open document	`Ctrl` +F6 (UNIX)
Navigation - Navigating a PDF Next open document	`Shift` + `Ctrl` +F6 (UNIX)
Navigation - Navigating a PDF Scroll up	`Arrow Up`
Navigation - Navigating a PDF Scroll down	`Arrow Down`
Navigation - Navigating a PDF Scroll (when Hand tool is selected)	`Space`
Navigation - Navigating a PDF Zoom in	`Ctrl` + `=`
Navigation - Navigating a PDF Zoom out	`Ctrl` + `-`
Navigation - Navigating task panes Move focus to the next item among Document pane, Task panes, Message bar, and Navigation bar	`F6`
Navigation - Navigating task panes Move focus to the previous item among Document pane, Task panes, message bar, and Navigation bar	`Shift` + `F6`
Navigation - Navigating task panes Move focus to the next panel in the Task pane	`Ctrl` + `Tab`
Navigation - Navigating task panes Move focus to the previous panel in the Task pane	`Ctrl` + `Shift` + `Tab`
Navigation - Navigating task panes Navigate to the next panel and panel control within an open Task pane	`Tab`
Navigation - Navigating task panes Navigate to the previous panel and panel control within an open Task pane	`Shift` + `Tab`
Navigation - Navigating task panes Navigate to the next command button within a panel	`Arrow Down`
Navigation - Navigating task panes Navigate to the previous command button within a panel	`Arrow Up`
Navigation - Navigating task panes Expand or collapse panel in focus (press F6 to move focus to Tools pane, then tab to desired panel)	`Space` / `Enter`
Navigation - Navigating task panes Open or close the Task pane	`Shift` + `F4`
Navigation - Navigating task panes Close the pane that lists the tasks of an Action	`Ctrl` + `Shift` + `F4`
Navigation - Navigating task panes Open the menu and move the focus to the first menu option when focus is on a command with a submenu or submenu element with a flyout	`Space` / `Enter`
Navigation - Navigating task panes Move the focus back to the parent command button with a submenu or submenu element with a flyout	`Esc`
Navigation - Navigating task panes Run the command in focus	`Space` / `Enter`
Navigation - Navigating task panes Navigate to the next item in the active panel in the Create New Action, Edit Action, Create Custom Tool, or the Edit Custom Tool dialog boxes	`Tab`
Navigation - Navigating task panes Navigate to the previous item in the active panel in the Create New Action, Edit Action, Create Custom Tool, or the Edit Custom Tool dialog boxes	`Shift` + `Tab`
Navigation - Navigation panels Open and move focus to navigation pane	`Ctrl` + `Shift` + `F5`
Navigation - Navigation panels Move focus among the document, message bar, and navigation panels	`F6`
Navigation - Navigation panels Move focus to previous pane or panel	`Shift` + `F6`
Navigation - Navigation panels Move among the elements of the active navigation panel	`Tab`
Navigation - Navigation panels Move to previous or next navigation panel and make it active (when focus is on the panel button)	`Arrow Up` / `Arrow Down`
Navigation - Navigation panels Move to next navigation panel and make it active (when focus is anywhere in the navigation pane)	`Ctrl` + `Tab`
Navigation - Navigation panels Expand the current bookmark (focus on Bookmarks panel)	`Arrow Right` / `Shift` + `[` + `]`
Navigation - Navigation panels Collapse the current bookmark (focus on Bookmarks panel)	`Arrow Left` / `-`
Navigation - Navigation panels Expand all bookmarks	`Shift` + `*`
Navigation - Navigation panels Collapse selected bookmark	`/`
Navigation - Navigation panels Move focus to next item in a navigation panel	`Arrow Down`
Navigation - Navigation panels Move focus to previous item in a navigation panel	`Arrow Up`
Navigation - Navigating the Help window Open Help window	`F1`
Navigation - Navigating the Help window Close Help window	`Ctrl` + `W` / `Alt` + `F4`
Navigation - Navigating the Help window Move back to previously opened topic	`Alt` + `Arrow Left`
Navigation - Navigating the Help window Move forward to next topic	`Alt` + `Arrow Right`
Navigation - Navigating the Help window Move to next pane	`Ctrl` + `Tab`
Navigation - Navigating the Help window Move to previous pane	`Shift` + `Ctrl` + `Tab`
Navigation - Navigating the Help window Move focus to the next link within a pane	`Tab`
Navigation - Navigating the Help window Move focus to the previous link within a pane	`Shift` + `Tab`
Navigation - Navigating the Help window Activate highlighted link	`Enter`
Navigation - Navigating the Help window Print Help topic	`Ctrl` + `P`
Accessibility Change reading settings for the current document	`Shift` + `Ctrl` + `5`
Accessibility Reflow a tagged PDF, and return to unreflowed view	`Ctrl` + `4`
Accessibility Activate and deactivate Read Out Loud	`Shift` + `Ctrl` + `Y`
Accessibility Read only the current page out loud	`Shift` + `Ctrl` + `V`
Accessibility Read out loud from the current page to the end of the document	`Shift` + `Ctrl` + `B`
Accessibility Pause reading out loud	`Shift` + `Ctrl` + `C`
Accessibility Stop reading out loud	`Shift` + `Ctrl` + `E`
Comments Sticky Note tool	`S`
Comments Text Edits tool	`E`
Comments Stamp tool	`K`
Comments Current highlighting tool	`U`
Comments Cycle through highlighting tools: Highlighter,Underline Text, Cross Out Text	`Shift` + `U`
Comments Current drawing markup tool	`D`
Comments Cycle through drawing markup tools: Cloud, Arrow, Line, Rectangle, Oval, Polygon Line, Polygon, Pencil Tool, Eraser Tool	`Shift` + `D`
Comments Cloud tool	`Q`
Comments Text Box tool	`X`
Comments Current Stamp or Attach tool	`J`
Comments Cycle through Stamp, Attach File, Record Audio Comment	`Shift` + `J`
Comments Move focus to next comment or form field	`Tab`
Comments Move focus to previous comment or form field	`Shift` + `Tab`
Comments Open pop-up note (or text field in Comments List) for comment that has focus	`Enter`
Comments Closes pop-up (or text field in Comments List) for comment that has focus	`Esc`
Navigation Move focus to menus	`F10`
Navigation Move focus to toolbar in browser and application(In application, sets focus to the first button in the top bar - Home)	`Shift` + `F8`
Navigation Navigate through the other controls in the top bar - Home, Tools, Document	`Arrow Right` / `Arrow Left` / `Tab` / `Shift` + `Tab`
Navigation Select a highlighted control in the top bar	`Enter` / `Space`
Navigation Move to next open document (when focus is on document pane)	`Ctrl` + `F6`
Navigation Move to previous open document (when focus is on document pane)	`Ctrl` + `Shift` + `F6`
Navigation Close current document	`Ctrl` + `F4`
Navigation Move focus to next comment, link, or form field in the document pane	`Tab`
Navigation Move focus to document pane	`F5`
Navigation Move focus to previous comment, link, or form field in the document pane	`Shift` + `Tab`
Navigation Activate selected tool, item (such as a movie clip or bookmark), or command	`Space` / `Enter`
Navigation Open context menu	`Shift` + `F10`
Navigation Close context menu	`F10`
Navigation Return to Hand tool or Select tool	`Esc`
Navigation Move focus to next tab in a tabbed dialog box	`Ctrl` + `Tab`
Navigation Move to previous search result and highlight it in the document	`Shift` + `F3` / `Ctrl` + `Shift` + `G`
Navigation Move to next search result and highlight it in the document	`F3` / `Ctrl` + `G`
Navigation Search previous document (with Search results displaying multiple files)	`Alt` + `Shift` + `Arrow Left`
Navigation Search next document (with Search results displaying multiple files)	`Alt` + `Shift` + `Arrow Right`
Navigation Select text (with Select tool selected)	`Shift` + `Arrow Keys`
Navigation Select next word or deselect previous word (with Select tool selected)	`Shift` + `Ctrl` + `Arrow Right` / `Shift` + `Ctrl` + `Arrow Left`
PDF Portfolios Move forward or backward among the current column header selected for sorting, the current row with focus, and the Go Back button if in a folder	`Tab` / `Shift` + `Tab`
PDF Portfolios Move focus to the next or previous row when in the body of the file list on the left	`Arrow Up` / `Arrow Down`
PDF Portfolios Selects the next or previous column header for sorting	`Arrow Left` / `Arrow Right`
PDF Portfolios If pressed in the body of the file list, navigate one level up from within a folder	`Backspace`
PDF Portfolios Press the Go Back button in a folder if focus is on the button.	`Enter` / `Space`
PDF Portfolios If pressed when focus is on a row in the file list representing a subfolder, navigate to a subfolder, or open an attachment in Preview mode.	`Enter`
PDF Portfolios If in the body of the file list, move to the first or last row	`Home` / `End`
PDF Portfolios If in the body of the file list, move to the next or last set of rows to fit the screen	`Page Down` / `Page Up`
PDF Portfolios Select or deselect all files	`Ctrl` + `A` / `Shift` + `Ctrl` + `A`
PDF Portfolios If in the body of the file list, extend the selection by adding the next row above or below the selected row	`Shift` + `Arrow Up` / `Shift` + `Arrow Down`
PDF Portfolios Change whether the row with focus is in the selection	`Ctrl` + `Space`
PDF Portfolios Move focus up or down one row without changing the selection	`Ctrl` + `Arrow Up` / `Ctrl` + `Arrow Down`
PDF Portfolios Reverse the sort order when focus is on a column header	`Space`
Tools Hand tool	`H`
Tools Temporarily select Hand tool	`Space`
Tools Select tool	`V`
Tools Marquee Zoom tool	`Z`
Tools Cycle through zoom tools: Marquee Zoom,Dynamic Zoom, Loupe	`Shift` + `Z`
Tools Temporarily select Dynamic Zoom tool (when Marquee Zoom tool is selected)	`Shift`
Tools Temporarily zoom out (when Marquee Zoom tool is selected)	`Ctrl`
Tools Temporarily select Zoom In tool	`Ctrl` + `Space`
Tools Select Object tool	`R`
Tools Edit Object tool	`O`
Tools Enter/Exit Forms editing	`A`
Tools Crop tool	`C`
Tools Link tool	`L`
Tools Text Field tool	`F`
Tools Cycle through tools in forms authoring mode: Text Field, Check Box, Radio Button, List Box, Dropdown Box, Button, Digital Signature, Barcode	`Shift` + `F`
Tools 3D tool	`M`
Tools Cycle through Multimedia tools: 3D object, SWF, Sound, Video	`Shift` + `M`
Tools Edit Document Text tool	`T`
Tools Cycle through Touch Up tools: Touch Up Text, Touch Up Reading Order, Touch Up Object	`Shift` + `T`
Tools Redaction	`Shift` + `Y`
Tools JavaScript Debugger	`Ctrl` + `J`
Tools Insert Blank Pages tool	`Shift` + `Ctrl` + `T`
Tools Insert Files	`Ctrl` + `Shift` + `I`
Tools Delete pages	`Ctrl` + `Shift` + `D`
Tools Open Output Preview	`~`
Tools Touch Up Reading Order tool (or if already selected, return focus to dialog box)	`Shift` + `Ctrl` + `U`