Problem inserting pick-up bar

[Bert_Ligon]

@Christian_R

Case B: you forgot to write the pick-up and want to add it :
-activate insert mode (global adjustment of current bar)
-select first note
-press enter (to activate the caret)
-choose the note value (with the mouse or the numbers)
-choose the note (with the midi keyboard or the letters)
-press enter or esc (to go out of note input mode)

Pressing enter starts playback for me. Not sure how to activate caret.
Choosing a pick-up note half-note moves the entire part over by half-note.