Bloomberg CAST and DDIS for credit analysis

Hey there, i just became a credit analyst and finally got my own Bloomberg Terminal(been hoping for it for years). my area is on the fixed income side. and i only know some cool bloomberg function like CAST and DDIS, DRSK... my senior teammates told me they like DDIS most. it's gonna take me some times to understand all the numbers on the DDIS screen.

but i also would like to get any advice from you guys about performing credit analysis with the bloomberg functions. thanks.