To rotate individual pages in the Viewer pane, use the Rotate Clockwise or Rotate Counterclockwise buttons on the toolbar, or click the hotkeys - " [ " for Rotate Clockwise and " ] " for Rotate Clockwise. These hotkeys also work in Presentation Mode.
You can also set your rotation on your documents by degrees. Let's say all your docs are tilted 10 degrees counterclockwise, you can fix that.
To manually deskew individual pages in the Viewer Pane, use the nudge buttons on the toolbar to rotate in small increments, you can also use the hotkeys of Shift + [ and Shift + ]. These hotkeys also work in Presentation Mode.
You can also set your rotation on your documents by degrees. Let's say all your docs are tilted 10 degrees counterclockwise, you can fix that.