How did you do notes held over the barline in Dorico? Hidden triplets?
Glad you enjoyed it!
Select the note you want to span the barline. Add a 1:1 tuplet. With the tuplet (and only the tuplet) still selected activate “Spans barline” and then “Number” (to hide the tuplet) in Properties.
For the tick barline in that staff the time signature in force must apply to that staff only (created with Alt-Enter). Hide it if it’s not the first time signature in the piece. Then you can add the barline with Shift-B, type “tick” or it’s shortcut, then Alt-Enter.
The shortcut for “tick” is ’ [apostrophe] which is nicely placed on my keyboard to add the barline quickly.