Click on the asset lane and check the box “Show main asset credit".
Sometimes you might want to show the name of the photographer (or any other info) connected to your asset (i.e credit). This is how you do it:
Open the asset browser and find the asset you would like to credit.
Fill out the credit and/or credit URL field. (It's not possible to change the credit on assets from the Stock Asset Services)
Mark the asset lane.
Check the box “Show main asset credit".
Un-check the credit box if you don't want credit on your image!