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On my Macbook Pro running OS X 10.6.3 I can't resize a window below the top of the dock. That is, I can't drag (resize) the lower right corner of the window below the top of the dock. However, I can resize below the top of the dock on my iMac at work (also running OS X 10.6.3). Note that I can drag the whole window such that the bottom goes below the dock.

Is there a setting to control this?

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up vote 1 down vote accepted

I have an external monitor connected to the iMac. The monitor's display goes below that of the iMac's. Thus it appears that OS X doesn't limit the downward resizing of windows.

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Go to Dock Preferences in System Preferences, just to be sure compare the two Macs' preferences.

It's most likely "Automatically hide and show the dock" checkbox.

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Preferences are the same between the two machines. – Wavy Crab May 27 '10 at 17:12

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