To set the default resolution of the Nokia N97 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:
QHD Portrait (360x640)
QHD Landscape (640x360) (with QWERTY keypad)
Click OK.
Restart the emulator.
The selected resolution will now be applied in the emulator user interface.