G-HAND/First finger Indexing AKA Pointing (pointing with the index finger).

Indexing indicates pronouns him, her, you, me, by pointing or you(plural), we, they, by pointing and then sweeping to the right in a straight line or concaved line depending on how the people are arranged.  

A-HAND Indexing

Indexing can also indicate possessive pronouns mine, hers, his, ours, yours, theirs.  The same rules apply as with pointing, the only difference is that the A-HAND is used.