Can't Change The Track In MS PowerPoint!

Greetings, friends! This is my first post on this forum, and I am new to it. I’ve set up a project in Microsoft PowerPoint, but I can’t change the track from there. Can somebody assist me in resolving the problem?

Edit: I performed some online study before posting here and came upon this article. I followed the method in the article step by step, and finally I was able to change the track that I wanted to.