Pentagrams and Hexagrams, invoking and banishing?? Options

I'm not quite sure if I fully grasp this whole pentagram and hexagram thing yet. so I'm going to post what I think is going on and then leave it open for corrections.

There's a banishing and invoking varient of the pentagram and hexagram for each element.
Now in raw assumption a banishing pentagram of fire would remove the presence of any energy of the element of fire? And likewise with other pentagrams? Or is it different than that.

And an invoking pentagram of fire would add the presence of the element's energy?

This is what's really puzzling me, the purposes of these. Aside from LBRP and LBRH which are well explained. But could someone give an example of uses and how one would might go about the use of these other pentagrams and hexagrams?

Thanks

Greetings! The hexagrams are usually used in influencing planetary forces.
Other uses of pentagrams and hexagrams involve the principles of Microcosm (pentagrams) and macrocosm (hexagrams). This topic could be expounded upon greatly. Some of the Lodge workers here will be able to quote chapter and verse about this. A good work to read is The Magical Philosophy by Denning and Philips of the Aurum Solis. There are many more alternative sources also...Crowley, Golden Dawn, etc.