How to add a light to text or shape like this

[Hùng300841368ra6]

I'm not good at English, I'm not good at English, I don't know how to design like the picture below (transform picture 1 to picture 2) and I don't know how to call this design's name. Please help me, thank you.

[Hùng300841368ra6]

This is Image:

[Monika Gause · Accepted solution]

I don't know if there is a name to it.

So basically there is no automatic way to do that. You draw shapes for those highlights where you think they need to be. You could alternatively draw open paths and then apply width profiles to them. That would be easier to edit.

[Hùng300841368ra6]

Thank you for your reply, I will try.
Do you have a video tutorial on how to design in Adobe Illustrator?

[Monika Gause]

Like this? To get out of this draw inside mode, just double click on an empty space

 https://youtu.be/O4e86EpWVCs 

[Hùng300841368ra6]

Thank you very much for taking the time to make the instructional video. Your clear instructions were incredibly helpful. Your channel shares very good and useful knowledge. I'd love to watch your content!

[Monika Gause]

Glad you could solve it! And thank you for your kind words.

Happy Holidays!