Certainly. You can hide and unhide sections from the Sections area of the Event App product. To do so simply click into the section you are looking to hide and select the checkbox for Hide section? before saving your change.
Should you need to reorder any of the sections you are using for your app, you can do so by selecting the Reorder Sections option at the top of the page, and then dragging and dropping sections into the order you wish to have them.