If you are using it for amateur radio, your first step is to get your id number from Motorola amateur radio club. (google DMR MARC). It is automated so your id comes back quickly. Then load the RM Ham code plug and you are set. You will soon find you have other preferences and modify the plug to fit your needs but their plug is a really good starting point.
You need the ID as DMR does not support alpha numeric call sign IDs. Your radio supports look up tables that display call signs based on that number.