Access this via Edit > Preferences > General.
General preferences include Startup, Page Display, Units & Grid, Full Screen and Miscellaneous options:
Startup
Show splash window
Determines whether PDF Viewer splash window appears each time it starts.
Check default viewer
Checks whether PDF Viewer is the default PDF document viewer each time you open PDF documents.
Application Language
Select the language used in PDF Viewer.
Page Display
Smooth
Selects whether to make text, graphics, and images smooth. The default setting is to smooth all.
Gray-out text below…pixels
Gray-out displayed text when the number of pixels is below the set value.
Use page cache
Select this to allow page data to be stored in temporary memory, so that page operations are speeded up.
Use logical page numbers
This is the default setting for page numbering.
Default Page Layout
Select an option to set the default page display when you first open a PDF document.
Default Zoom
Set a default magnification level for PDF documents when they are first opened. This value is used when the document zoom value is set to Default.
Miscellaneous
Open cross document link 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 documents. If you do not select this option, a new window opens each time you click a link to a different document.
Hand Tool Click
Determines how the document responds when the Hand tool is clicked. By default, it does nothing. Choose Page down to have the display jump half a page down. Choose Scroll down to have the page scroll down until the next mouse click.