hello. i am creation a song packet and desire to placement mine. how do i placement mines in step editing?

md9r project: step mania themer, step chat come soon.
Press F1 to see a list of key bindings. Three from the bottom it says "Cycle between tap notes: N/M". So press M or N, and the "Tap Note:" line on the right side will change between Tap, Mine, Lift, and Fake.