The theme has three types of templates 2 column, 3 column and 4 column depending on your layout requirement you can use the respective templates. You can select any one template for the project. Firstly, You need to create some projects to display on a project page.
1. How to Add Project?
Using this tutorial you can add project. Click Here
2. How to Create Project Page?
Go to => WP-Menu => Pages=> Add New
Firstly, Create a page by the name of Project or your chosen name. Select any one-page template like project 2 column, project 3 column and project 4 column then publish the page. Refer the screenshot.
3. How to Manage Project Page Setting?
Go to => WP-Menu => Appearance => Customize => Templates Settings => Project Template
Here you can manage project page title & description. Refer attach screen shot.