Copy-pasted from man mupdf:

A description of each of the supported options is included below.



-p password

        Uses  the  given  password  to  open an encrypted PDF file.  The

        password is tried both as user and owner password.



-r resolution

        Changes the initial zoom level, specified as the  resolution  in

        dpi.  The default value is 72.



MOUSE AND KEY BINDINGS



In  addition to the key bindings described below, the mouse can also be

used. Clicking the left mouse button follows links within the PDF while

dragging  with  the  left mouse button pans the page. Dragging with the

right mouse button selects an area and copies the enclosed text to  the

clipboard  buffer.  Using the scroll-wheel while pressing Control zooms

in/out, if Shift is pressed on the other hand then the page is panned.



L, R   Rotate page left (clockwise) or right (counter-clockwise).



h, j, k, l

        Scroll page left, down, up, or right.



+, -   Zoom in or out.



w      Shrinkwrap window to fit the page.



r      Reload file.



. pgdn right space

        Go to the next page



, pgup left b

        Go to the previous page



<, >   Skip back/forth 10 pages at a time.



m      Mark page for snap back.



t      Pop back to the latest mark.



[0-9]m Save the current page number in the numbered register.



[0-9]t Go to the page saved in the numbered register.



123g   Go to page 123.



/      Search for text.



n, N   Find the next/previous search result.



c      Toggle between color and grayscale rendering.