When you're viewing a workspace, you can use the workspace filter to quickly display only a subset of topics that you're interested in. For example, use it to easily view:
To filter the workspace, click on the filter icon in the upper right corner or use the keyboard shortcut
F, then start typing in the filter box. The workspace is filtered as you type and instantly displays only matching topics.
There's no special syntax for what you type into the filter box. A topic can match based on any text that's displayed on the topic's card, including the title, parent topic title, labels, blocker descriptions, and the name of the topic owner.