Trouble drawing on saved images in whiteboard, please help!

I use the Image.IO.write(image,"png",file) method to save my whiteboard drawings onto a file and it displays fine when I import it. But when I draw on it it seems some of my whiteboard buttons are "blending in" with the drawing area where the image is. I guess a way to imagine is there is a row of buttons then a panel containing the image. When I draw on the image area the image of the bottons above are mixed in and everything looks bad. Any idea what I am doing wrong in saving the image? thanks!

Yes, I see the big ugly squares. They are what appears whenever extremely heavy JPEG compression is applied to a low-resolution image tht has relatively large areas of similar colors. Something somewhere is applying such compression to the pages, or portions of them, that you are viewing in your browser(s). Your MBP is not doing that: it can't. Either the page images (or parts of them) are being compressed by the website owners or, if every web page is affected, they are being compressed by your ISP in the process of being transmitted to you, as Gordito suggests. That would greatly increase the speed of page loading, but at the expense of image quality. You wouldn't see the image degradation on an iPhone or cell phone — the screen is too small — but on the MBP's high-resolution display it would be much more apparent, IF the MBP were receiving the signal in the same highly compressed form as the phone. If the MBP receives the same web pages through an ISP that doesn't over-compress them, they'll look the way they ought to look. So if you are receiving these web pages through a cellular ISP rather than through a broadband connection, take the MBP to a wifi hotspot and connect through wifi instead. I bet things will look different then.
Compressing images is something a web browser can't do: a browser just displays the signal that comes to it.

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