How to remove and how to adjust?

How do I remove this? Congratulations! You have successfully installed your Zen Cart™ E-Commerce Solution.

And How do I adjust the view larger image size?
When you choose this the larger image is to big to see.

New at this.

Read the tutorials as they explain this and a good portu=ion of the questions you will asking about 10mins after fixing that issue

https://www.zen-cart.com/tutorials/index.php?category=5

Number 4 is what you want, then probaby number 5

Its a good idea to type in the text you want to remove into either the forum search box or the tutorials search box as they will both normally have the answers you need

Bad1:

And How do I adjust the view larger image size?
When you choose this the larger image is to big to see.

New at this.

admin --> configuration --> Images

Thank you on the first part, still not sure on the second part.