Setup working multimedia/extra keys on your keyboard

From Granular Linux Documentation

If you have one of those keyboards that boast of some "extra" keys or multimedia keys, you could put them to a better use, the use which they are meant for. Granular 1.0 includes a package called hotkeys pre-installed. If your keyboard (desktop or the laptop one) is supported by this little utility, you can easily setup those extra keys to get them working. To do this, issue the command hotkeys -l in command-line (Konsole) and find your keyboard in the list that appears. If it is there, note down the code corresponding to your keyboard. Now, go to your home folder and click on View > Show Hidden Files. Next, go to .kde folder and then the Autostart folder. Create a new empty file there by right-clicking the empty area and selecting New > Text File. Open the file for editing and put the following contents in it:

#!/bin/bash
hotkeys -t xxxxx

Replace "xxxxx" with the code corresponding to your keyboard. For example, hotkeys -t dellinspiron. Save the file with the name hotkeys.The next time you boot into Granular, you shall find your extra keys working!