To send coins enter the amount to pay to the address and click send. A small transaction fee will be deducted and your coins will be sent.
To receive coins click the gear icon, select the Addresses tab, copy the default address and give it to the sender.
To mine for coins there are two options available, solo or pooled mining.
For solo mining click the gear icon and select the Mining tab then click start. Your hash rate will be displayed after a short time. To stop mining click the stop button. If you are using the command line client use the --mine-cpu=1 option.
* Please note that solo mining is no longer viable due to the current difficulty and pooled mining is recommended.