Reading the help it sometimes sounds to me I can modify a note , rest or w.h.u already in the staff ,after selecting it, instead of delete and write again.
This doesn't happen. Have I read it wrong?
https://forum.noteworthycomposer.com/?topic=343.0, for example.
Yes, you can. Highlight the note and then pressone of the numeric keys 1 to 6.
or press the full stop to add a dotted note or again for a double dot.
You can also modify duration by highlighting a note and pressing the plus key on your keyboard (doubles the duration - from a quarter to a half, for instance) or the minus key (cuts the duration in half). For the full range of alterations possible to a note (or anything else in the score), highlight it and press <alt><enter> to bring up the Properties dialog box.