Can't parent a bone to another after joining them with ctrl+J


So after joining the two armatures using ctrl+J, I can’t seem to be able to parent the selected bits. Does anyone know how? (The parent I’m looking for is that dotted line sort of parent)

It doesn’t look like you have the bones selected, only one’s head and the other’s tail. To set parenting relationships, I think you need the whole bone selected.

Thank you, it worked!