@jonYDM8U - there are several important concepts that will help you here:
- minor one: Yes, you cannot activate a linked component (the round button on the end of the browser line for that linked component). That operation would not make any sense, because component activation is all about ownership of new items like sketches, work geometry, etc. For a linked component, you cannot put anything new into it from the top level, so it cannot be activated. You can open this design in a new tab and edit it there. Someday fairly soon, you will be able to edit it in context, but not yet.
- I notice that you have no joints or rigid groups in any of your designs. This is the preferred way to group components together so that they form a rigid unit (or even define motion between components).
- The "Move vs Align" thing. This is, admittedly, an unfortunate and misleading aspect of Fusion. The Move command, when you select an assembly, will try to move all the child components of that assembly together, even if they are not related with Joints. In my opinion, this is misleading behavior. It has clearly misled you. Align, as you noticed, requires geometry, such as a face, to align, and so only aligns the component that directly owns that geometry - not anything else.
The best advice I can give you is to group all associated, rigidly joined components with a Rigid Group, or with Rigid Joints. Things will work much better for you.
Jeff Strater
Engineering Director