Estiasis comes with an automatic detector of page types, so for example a Photo Album page will always be presented in a grid layout as shown in the demo site.
Photo Album stack
A portfolio can be easily made using the included Photo Album stack (Stacks plugin needed), assigning each image to a separate page or elsewhere on the web. An example of a portfolio is included in the tutorial project.
Important: When making a portfolio from scratch don't forget to disable the lightbox option.
In the video below another theme is used, but the procedure is the same.