Aisha Hmmm, I am quite confused by your question, because a Spine project can have multiple skeletons, but the exported skeleton data will always be one per skeleton. Atlas files can be one for multiple skeletons, but it is not possible to export all the skeleton data into one, at least directly from Spine. So I don't understand the situation you're having trouble with. Could you describe your situation in a little more detail?

Aisha Ah, I see, you are looking for an easy way to specify the bone name in the bone follower component. For complex skeletons, it may be better to comment out the line 60 of BoneFollower.cs: EsotericSoftware/spine-runtimesblob/c85000b5f81bd93bcdd9cd2ae6e3789ac2907492/spine-unity/Assets/Spine/Runtime/spine-unity/Components/Following/BoneFollower.cs#L60

The [SpineBone(dataField: "skeletonRenderer")] attribute allows the bones to be selected from the dropdown list. Unfortunately, the dropdown list is difficult to improve because it follows Unity's UI specifications, but if you comment this out, you can specify the bone name by entering it directly, which may be more comfortable in some cases: