how to add links that send the user to a part of the same article?

Hello guys,

I would like to know if there is a way to for example to have an index in the begining of an article that sends the user to an specific part of the same article, or that i could put some buttons or links at the begining that sends the user to an specific title inside the same article like jumping to an specific location in the same article?

Hope can helpme.

Thanks!