To start searching the Storage, click the Find button on the Software tree toolbar. The search field will appear below the toolbar.
Matching text is instantly highlighted as you type:
The contents of the Software tree are filtered to only display the software and categories which match the query, and the rest is hidden.
If the queried text matches a category name, all the software in that group is displayed.
You can use the up and down arrow keys when the search field is in focus to navigate the Software tree.