[Theme: accesspress lite] Slider problems

I’m using accesspress lite and I love it. My only problem is the slider. At the moment I’ve simply created a visual work around. The problem is, when I link a post to the slider, the feature image shows up, then on top of that is the entire post’s text, title included. I’ve read that I need to add a heading and description to my posts, and I’ve attempted to look up how to do such things, but I’m coming up with nothing. At least nothing I understand.