Hello, I was uploaded the PNG file 800 x 400 pixel in the same time with my font but does not show up. What can i do , please tell me . Thank you so much.

Hi, that's because the background image you used is a very low quality jpeg.

Thx so much ^^

so i ask again, i should be make 800 x 400 pixel 72 dpi or bigger ? Thx. so much

It's not a matter of resolution. You just shouldn't used very low quality jpeg as background images.

Thank you so much