In BSC Designer you can specify and display a short mission/vision statement.
1. Go to the "Business Goals" tab.
2. Select the main root element (by default it is named "Balanced Scorecard")
3. Enter the text in the "Mission" field below or click "..." button to access more details.Now, if you will switch to the "Strategy map" tab and update your "Balanced Scorecard" map, you'll see the mission statement on the top.