Anyone know how to fix pixelated lines when designing clothing?

Hello. I have had this issue on when I design clothing, the lines become pixelated making the lines appear way thicker then I want them to. I’ve tried searching on YouTube for help, but no luck.

Here is what I’m talking about (zoom in to the neck area and probably brighten your screen):

Does anyone know how to fix this? (Btw I use Pixlr E)

This is just a known issue in pixlr e. As a pixlr e user, I’d know.

The main reason people prefer paint.net over pixlr, is because pixlr tends to ruin the quality of your design.