Like looking for all of my DEX servers? As opposed to looking/scrolling thru them all.
SSMS doesn't offer search capabilities in the Registered Servers.
After installing the DBA Database (or the solitary view), you can simply connect to the CMS using a query window and do a search like:
SELECT * FROM dbo.CmsServers WHERE ServerName LIKE '%DEX%';
The view also exposes group membership and the full hierarchy at a path so you can do something like:
SELECT * FROM dbo.CmsServers WHERE ServerName LIKE '%DEX%' AND ServerPath LIKE '%Production%';
If you're using locally registered servers, you would have to migrate those connections to a CMS to use the view. Thankfully, even Express Edition can be used as a CMS to save on licensing costs.