Save and restore groups of calendars selected

Note: only works in the new Material-based Google Calendar UI!

This is a built-in extension for Google Calendar.

You can press Ctrl+Alt and the highlighted key for the main functions (highlighted key is one of e, s, r, c, i, x, or p).

The settings for groups are stored in your local browser storage and sync across devices automatically (using Chrome's built in syncing mechanism).

How does it work?

You press the "Save Presets" and "Save and Restore Presets" button to create groups of calendars that you can later use with the "Save and Restore Presets" button.