How do I fix grainy PDF annotations on MacBook and reduce battery drain in Notes app on iPad?

Hello, I'm experiencing issues with the application preview on my MacBook when trying to view PDFs annotated on my iPad. Every time that I'm looking at my notes, it shows up on my MacBook is very grainy and not as clear as it does on my iPad I was wondering why this is and how may I fix this?

I have a MacBook Pro M4 chip 2025 and my iPad is a iPad Air 11 inch 2025 also and it's a M4 chip I believe too. Please let me know what to do. Also, my iPad has a Apple Pencil Pro.

Also, I have a question about how to mitigate or stop the overheating of my iPad when it's using the home built app notes for taking notes for class. After an hour or so of use in this app, I noticed that there's a significant battery drain I've taken it to Best Buy and I've taken to the Apple Store. They've both said they couldn't find any problems with it and I don't know what to do and it annoys me too because I need it for more than an hour. I don't wanna put it on the charger and have my hand baking while I'm driving notes. Please let me know what to do also for this problem and for these issues thank you.

[Re-Titled by Moderator]

Original Title: Issues with iPad and Native App Notes and the battery consumption, and also Issues with Preview on Macbook Pro 2025 M4 chip, and viewing the annotations made with my iPad Air 2025 M4. The notes come out grainy on my Macbook, and I want to fix this.