Enlarge on
Definition 1 of 1
Pro Tip 1/3More Details
Use 'enlarge on' when you want to provide more information or go into depth about a specific subject. 
The teacher asked the student to enlarge on his argument about renewable energy.
Pro Tip 2/3Speaking Context
'Enlarge on' is typically used in spoken English when asking for additional explanation. 
Can you enlarge on how the solution works?
Pro Tip 3/3Avoid Repetition
Be careful not to just repeat the same idea. 'Enlarge on' means adding new, valuable information. 
I'll enlarge on the concept by providing some statistics and case studies.