Android emulator screen too tall - Stack Overflow:

From within Eclipse:

Go to Window -> Android SDK and AVD Manager -> Virtual Devices
Select the AVD you want to launch and click Start
Check the 'Scale display to real size' button
Enter how big you want it to appear in inches and press Launch. For this to work, you'll have to also enter a reasonable approximation of your mac's screen resolution. I'm using 7 inches and 113 dpi for my 13' Macbook Pro, but you may be able to get away with 8 or 9 inches.