@Lynne873,
Welcome to the HP Support Community!
I reviewed your post and I understand that you are facing issues with the print quality.
Don’t worry, I assure you I will try my best to get this sorted.
I recommend you follow the steps in the below article and check if it helps.
https://support.hp.com/us-en/product/hp-envy-photo-7800-all-in-one-printer-series/9073159/document/c...
Let me know how it goes and you have a great day!
If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!
Cheers!
The_Fossette
I am an HP Employee