The text entered here will be passed to the Android emulator executable at runtime.
For a full list of available options, please run emulator -help, or consult the Android Emulator page on the Android Developers' site.

Environment variable substitution can be used for these command line options, in the format: ${VARIABLE_NAME} or $VARIABLE_NAME.

For example, if you want your emulator to have a larger-than-default /data partition, allowing you to install large APKs, then you could enter:
-partition-size 128

Options which cause the emulator to create files, for example the -tcpdump option, should be given an absolute filename, e.g.
-tcpdump ${WORKSPACE}/network.cap

Similarly, because arbitrary options can be combined here, you must make sure to add double quotes around any parameters which may contain spaces, e.g.:
-netdelay gprs -tcpdump "/tmp/emulator captures/${JOB_NAME}_${BUILD_ID}.cap"