I believe this to be a bug with Avogadro
Avogadro version: 1.93.0-2-gf4e4606
Operating system and version: Ubuntu 18.04
Avogadro version: 1.91
Operating system and version: Windows 10
While in manipulation mode, right-click and dragging should rotate the selected fragment.
While in manipulation mode, right-click and dragging translates all the fragments present.
Steps to Reproduce
- open avogdro2
- left-click and drag in build mode twice, to build two ethane molecules
- go to selection mode and left-click and drag to select only one ethane.
- go to manipulation mode, right-click and drag: both ethanes are translated.
If any more info is needed, please let me know