After you have created a custom page, you can easily view which template you are using, and switch to a different one that suits your content.
- When you are viewing your custom page, click the "Edit this Page" orange tab on the left.
- After the page refreshes and you are in Edit mode, click the orange tab again that now says "Options".
- Click "Switch Templates" - this is where you can see what template is currently selected, and have the option to choose a different one. In the image below, Template 2 is currently selected.