Copy-Paste Doesn't Work Properly In Piano Roll

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If I copy a selection like this:
Image
,there will be like nothing when I paste.

There are no blue colored notes which I could move. But if I moved a single note from that selection (after I pasted the clipboard) there is another note below.
Hi there,

The copy-pasting works as described in this video: https://www.youtube.com/watch?v=qC6LLNrrMGs

If you unintentionally pasted notes on top of other notes, you can use the undo function (ctrl+z).
Oh thank you! That is very helpful! :D

Now I know that I need to move the triangle to paste correctly.
'the triangle' is also known as the playhead :)
I really think reading at least the first part of the wiki,
https://lmms.io/documentation/Getting_Started
could help you @vecciora, and let you get more fun from using lmms :)