4
The pdf file I use is high quality, and if you were to zoom at a letter as much as Adobe Reader can handle, you still find it difficult to look at a blocky pixel at the edges of a letter. But when I convert to PNG, it will zoom and the letters will look very pixely, it's as if it only saved the details that can be observed at its normal display size. How can I fix this? imagemagick is a last choice, if there's a different program tell me
Try converting to a higher resolution PNG, eg 300 DPI and see if you're able to zoom a reasonable amount without very high pixelation. – Edi – 2019-05-17T19:14:22.893