Hi, Welcome to the Forum MNK !
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http://lmms.io/forum/viewtopic.php?f=1&t=4740
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You are correct, you cant expand MIDI-note-segments by just dragging them longer, and that can be strange for those that are used to work in FLstudio. But its a pr-design arke-typic feature in LMMS. I doubt it will changebut it’s a bummer that I can’t loop a segment. I would have to copy and paste it.
But are you aware of how simple it is to speed copy any block, not just to neighbour-position, but even to other tracks?
Just point
* Hold ctrl
* left-click
* drag a copy of the block to any position you like.
That is just as easy as dragging the block longer -Isent it? ! And.. In LMMS this new copy can be pasted in any other midi-track. You cant do that with expansion