Hi there! Please allow adding rhythmic notation on individual notes/chords (or parts of measure). Thank you.
Note “A” is in Regular Notation (previous notes also), but the notehead is changed (this is why it looks like Regular and Rhythmic notations can coexist in the same measure).
Notes from “B” onward are all Rhythmic Notation and what is tying “A” to “B” is a slur, not a tie.