Attaching an external monitor
Considerations for using a dual display function
The primary display is always the LCD of your computer, and
the secondary display is either a CRT or a television.
When you enable the dual display function on a television, you
need to first connect a CRT. After enabling the dual display
function on the CRT, change the output location to the
television.
You can select up to 64K colors for your secondary display,
either the CRT or the television.
You can select a resolution up to 1024 x 768 for your
secondary display.
If you set the CRT as your secondary display and you want to
show DOS full screen, both the primary display (LCD) and the
secondary display (CRT) become DOS full-screen modes.
If you play a video clip (AVI or MPEG file) while using the dual
display function, the image is in overlay mode only on the LCD.
If you play a video clip (AVI or MPEG file) and move the cursor
on the window, the cursor disappears under the image.
When an application using the DirectDraw or the Direct3D is
played in full-screen mode, it is shown only on the primary
display (LCD).
You cannot use the Fn + F7 (display switching) function when
you are in the dual display mode or when you are displaying
the image on the television simultaneously with the LCD.
74 IBM ThinkPad 600X User's Reference
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