i don't get step clips

[reconditerosemary]

I'm trying out step clips and watching a few tutorials, but i have not found one on how to add rows with sounds in them? like i can create a step clip and add the micro drum sampler on the track but not all of the sounds from e.g. the micro 808 are added in. I've looked some stuff up, someone said that there should be a "add rows from instrument" button somewhere but i just don't see it. and i DEF won't figure out how to work with any other plugins if i can't do it with the basic micro drum sampler....is this because im using waveform free or smt????
edit: i looked at an "adding instruments to step clip" thread and could not figure it out