1) The panel on the left side specifies the values of the context variables.
2) It shows that the current section must be "full-text" and the current title (the last seen heading) must be "References".
However, now I think they would be better to be separated but just for the sake of learning, how could I combine them?
Could I say
1) The panel on the left side specifies the values of the context variables, showing that the current section must be "full-text" and the current title (the last seen heading) must be "References".
2) The panel on the left side specifies the values of the context variables, in which the current section must be "full-text" and the current title (the last seen heading) must be "References".
3) The panel on the left side specifies the values of the context variables, so the current section must be "full-text" and the current title (the last seen heading) must be "References".