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If you are using Safari and the OS is Lion (10.7 or above), move your cursor to the upper right hand corner of the browser. You will see two diagonal arrows, diametrically opposed to one another. Click on that and your browser will dominate your screen.
When connected to an external display you have 2 options. Extended you can stretch across both screens like a giant desktop or you can have mirrored displays which have exactly the same thing on each. With your monitor plugged in...
Open Apple ▸ System Preferences..
Go under Arrangement section
Check the Mirror Displays check box
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When you connect an external monitor to your MacBook (or PowerBook,
for that matter), you can combine your MacBook's LCD and your external
monitor to create one big monitor. That means when your mouse pointer
goes off the edge of one, it will appear on the other. Open the
Displays Preference Pane to configure the resolution and orientation of
the two monitors. This type of configuration works well when you want
to keep your main work on your larger external display, but still keep
things like IM, iTunes, and email constantly visible on the smaller
Some windows act like they don't want to be
dragged on to your external monitor. If a windows is being stubborn,
try dragging it up to the menu bar, and keep dragging, even if stays
stuck below the menu bar. Sometimes once you have dragged it far enough
that it has room to render the entire window, it will jump to the other
monitor (Terminal used to have this problem, but Apple fixed it some
time ago). If that doesn't work, try dragging it from a corner of your
monitor. My Adium contact list
doesn't seem to want to live on my external monitor, but I can coerce
it up there by dragging up from either corner.
laptop is open, you can't switch to using the full resolution of an
external monitor. I have no idea why, but it's a fact of life for
MacBook users. You can use both displays in "extended" mode, or you can
mirror your MacBook's display (which most likely doesn't use the full
resolution of your external monitor), but you can't switch to using
only the external monitor. Very strange.
If you close your
laptop, you can actually get the full resolution of your external
display. Put your MacBook to sleep, connect your external display and
an external monitor, and wake the computer up by pressing any key. You
will have full use of your external display while your laptop is closed.
you really want to have your MacBook open while only using an external
display, after following the procedure above, you can open your
MacBook, and it's screen will remain off, which means you can still use
the MacBook's keyboard and trackpad. Why you can't get into this mode
using F7, I have no idea. This is a good technique for allowing some
heat to dissipate while still using an external display so the lid of
your MacBook doesn't melt or warp.
You can boot your
computer using just an external display. Just connect your external
display, open the lid, hit the power button, and close the lid again
In order to output only to an external monitor,
you have to have the power cable connected. I tried for several minutes
yesterday to get my MacBook to wake up with an external keyboard and
monitor before unpacking my AC adapter from my backpack, and it
wouldn't work. It took me a while to make the connection (no pun
intended), but I eventually discovered that with the power cable
attached, everything works as expected.