Steps
Open the Resources page from the main left navigation sidebar
Find the resource you want to add to your canvas
Click "Edit in canvas" on the resource card to open it directly in a board
The resource will open in a new board canvas
Click "Open" to insert the resource at the current view
Download the resource as needed
Notes
Opening a resource creates an instance on your board
You can edit opened resources without affecting the original
Multiple copies of the same resource can be added to one board
Opened resources maintain their original design and properties