copy/paste should work: select a group of notes with right-click and dragging the selection rectangle around the notes to copy (note are highlighted in white). Then ctrl-C, ctrl-V, and finally move the copied notes to another position.
If it still doesn’t work, can you describe what you are doing and what is happening?
I’m not sure to know what is the problem, but it might be caused by a conflict with the browser’s own shortcuts handlers. Just by curiosity, can you tell me which web browser you are using?
To try to fix that, I added a new option in the settings menu to allow using shortcuts without pressing ctrl/cmd keys. ctrl+Z just become Z, and so on.
You need to refresh the page after changing the option for it to take effect.
I tested on Firefox and I had the same issue as you. But the new option fixed the problem for me.
Please make sure you checked the “do not require ctrl/cmd” radio button in the Petaporon’s settings (top-left corner button). Then reload the page (make sure the option is still set after reloading. Petaporon store the settings in the browser’s local storage).
Only press Z to cancel (ctrl+Z will probably still conflict with Firefox, so Petaporon will not receive the keystroke). Similarly, only press X, C and V to cut, copy and paste selection of notes.
