Making slidein come in at the bottom right


I am wanting my slide-in to slidein at the bottom right, I was unaware this is not the case.

Can and how do I make this happen?

Also is there also a way that when it slides out again, there is a tab left there so website visitor, can choose to click on this - instead of it disapearing?

Prior to purchase did not find any working demos only images etc.

Help will be appreciated

Thanks Janet