(edited)

Problem
As you see in the screenshot, I cannot see the source code in the v0 editor to make manual changes.

As you see in the screenshot, I cannot see the source code in the v0 editor to make manual changes.
Did you know there's another category dedicated to #v0 topics? A human should be here soon to help, but the answer may already be available even faster in one of these other posts.
Our docs are a great place to start.
We also have a walkthrough to help guide your workflow.
https://community.vercel.com/t/become-a-v0-expert/5981
And these recordings can give you a look at v0 features and strategies in action shown by our Community:
Can you share a chat?