Content packs can contain only a couple items, or they can be expansive with hundreds of individual elements. There are multiple ways to add content to allow you to add only what you need.
Add All
When you find a piece of content you want to add, mouse over the listing to expose the import button.
Click the import icon to place the entire pack in a single click.
If Usages from the pack have names matching your project, you will be asked to select replacement behavior.
Likewise, if analytics grouping and/or charts from the pack differ from the project, you'll be asked to keep or replace:
Once you confirm your Usage and Analytics preferences, the content pack will be added to your current project.
If the content pack includes geometries, the elements will be placed at the center of your screen:
Select Individual Pack Contents