Property blocks allow you to add and organize information about your Element in the right-side panel.
Add a property to the properties bar on the right by pressing the "Add block" button
Modify existing properties & label display settings by clicking the context 'grip' that appears when you hover your mouse over a block.
Image blocks let you add an image.
The Alias block lets you assign alternate names to an element.
The Tag block lets you assign organizational tags.
The Backlink block shows you other elements that link to this one.
Text blocks let you add custom text.
Link blocks let you add internal links to other parts of your project.
The Subpage Index block lists the pages underneath this one.
Spotify blocks embed a Spotify track.
YouTube blocks embed a Youtube video.
The Pin Appearance block lets you customize this element's pin.

A quick tutorial to get you started. (This is a customizable text field with a title!)
The block above is a link block, creating by dragging elements from the left sidebar into this one.
The block above is an alias block, which lets you give alternate names to elements.
Use tags to organize your elements.