wat happen2 add event on call screen after a call?y cant I add text to picture message since update

[AC Question]

Ever since the marshmallow 6 update my Note 5 phone has been terrible no longer when on the phone can I add an event since the marshmallow update which was very important to me since I use my phone for business also when sending a multimedia message it no longer allows you to add text words to a picture message the marshmallow update has been no good and the phone is worse than ever before the phone works perfectly fine until the marshmallow upgrade came out it is not an upgrade its a downgrade marshmallow is the worst I have ever seen come from Android