You can create any kind of sections for your day that you want with this handy strategy. 

Turn it on by going to ☰ → Features/Strategies and then go to the strategy settings to set up your custom sections:

Your day now has your custom sections:

In the settings you can decide which section is the default section. This means that any task that is not specifically created inside a section or has a section assigned goes there.

By choosing a Bonus Section, tasks that are displayed in that section won't have procrastination counts displayed on them, assuming you have the Procrastination Counts strategy enabled.

If you wish to automate this, you can create a few Smart Lists and connect them with sections. For example, you can have tasks and projects sorted into 3 sections based on their duration estimates. To do that, you can first create 3 Smart Lists that select tasks based on how long it takes to complete them:

And then connect them with sections:

That way when you create a task with duration estimate it automatically gets sorted:

Another example is using custom sections to sort tasks based on when you're going to do them: How to automatically assign sections to items

Since the item grouping isn't synced to the cloud you'll have to manually set the grouping on each new device. To do that, in your main view, click on the "Group by" icon and set grouping to the "Group by custom section". 

How to assign recurring tasks to sections