The search bar in the left hand panel will allow you to search by plan name, feature name or assigned use.
Input your search criteria and the returned results will display below.
When the results are features contained within plans you can select in the left hand panel and you will be zoomed to the highlighted area on the map.
When the results are plans that plan will be highlighted in the left hand panel and you will be zoomed to the plan area.
Please note whilst hidden plans will show in the search results hidden features within plans will not be returned. Make your plans visible for the features contained within to be available in search results.