Why don't I have a mode select in the Particle System's Texture Sheet Animation module?

I want to import a custom made particle sprite but when following a tutorial I noticed that I’m missing what seems to be an important part of the module(The ‘Mode’ selection). Can anyone explain why I am missing this or how I can get it to appear?


WHat unity version are you using, i have found this:

Functionality of Texture Sheet Animation module changed in Unity 2017.1