Hello I want to ask. how to solve export instead error code 516? and also how to lower the pixel?

Huh? Sorry, but what you wrote is incomprehensible gibberish. You need to make an effort and actualyl explain what you are trying to do and also provide the necessary technical details like system info, render settings, contents of the project, at which point the error occurs, exact error messages and so on. Nobody can even guess what's going on based on a number and a half complete sentence.

Mylenium