How to create a project
To create a new project, simply click the "New Project" button in the top right corner. Before your project is created, you will need to configure some of the project settings like the project name and the template's aspect ratio. You can edit all project settings at any time if you change your mind or want an aspect ratio that is not among the available presets.
How to create a project with a specific aspect ratio?
If you need an aspect ratio that is not among the available presets, simply create your project with the default ratio of 1:1 and then edit the canvas size to whatever you need in the settings of your project.