Expand Leads and Opportunities tab an click Opportunity Funnel.
On the Opportunity Funnel page click "Filters" button.
On the Opportunity Funnel Filter page:
You can filter via:
Opportunity ID - this must be the exact OPP ID (useful if you know exactly what you are looking for).
Opportunity Name - you can search the key word, any Opportunity name that has that keyword will show on the menu.
Sales Rep - to choose which assignee you want to show.
Stages - Filtering by one or more sales stages.
Forecast Date - you can filter by Forecast date range, from Start date to End date.