To set the default resolution of the S60 emulator, do the following:
Open the Preferences window.
In the Preferences window, select the General Settings tab.
Select the desired resolution from the Initial Resolution drop-down menu.
The options are:
NHD Portrait (360x640)
NHD Landscape (640x360) (with QWERTY keyboad)
QVGA Portrait (240x320 )
QVGA Landscape (320x240)
Click OK.
Restart the emulator.
The selected resolution will now be applied in the emulator user interface.