Using this document

These course notes are designed to be used in conjunction with Astun’s QGIS Essentials course, and the dataset and slides provided with it.

...

Text which appears in the QGIS user interface, for example as panel or field names, menu items or items in a dropdown, appears appear in bold: View > Toolbars

Instructions for exercises are shown in an information panel, with numbered steps:

Add Annotations

...