> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ai-gust.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Years, quarters and periods

> Switch between book year, year-to-date, quarter and period views.

<Note>This page is a draft. The list below shows what it will cover.</Note>

## To cover

* Book year vs year-to-date
* Show or hide the open period
* Quarter and period view
* Comparison with the same period last year
* Going back to the year view
* Why quarter or period view is sometimes unavailable