Coffee Cup Question

I am using the theme Coffee Cup and I looking for help with a single item right now if anyone can help. When I write a new page, (not a new post) I am looking to have the content centered. Right now it aligns to the right. I have tried to fiddle with the page template but I think it is getting it’s info from the style sheet. I am not sure where to change the “content”part of the style sheet that affects the content alignment of this item. If anyone could help I would be thrilled. I can answer any questions if people need more information. You can see an example of my trouble at https://simonlevenson.com/wordpress/?page_id=5 I am looking to get the word paintings and image to be centered. I have tried the simple tags for center. Thanks again.