About of PNG Format:
PNG is the Portable Network Graphics format, a format for storing bitmapped (raster) images on computers. Unofficially its acronym stands for "PNG's Not GIF." PNG was designed to be the successor to the once-popular GIF format.
Setting of PNG Format:
Here you can define the output image PNG resolution. Usually, a higher resolution setting will result in larger but higher quality PNG format, while a lower setting will result in smaller but lower quality PNG file.
Important: Low resolution is ideal for screen viewing. However, if high-quality paper print or the accurate control of character position is required, you should specify resolution above (include) 600dpi.
· High Color (24 bit).
· 256 colors (8 Bit).
· 16 colors (4 Bit).
· 2 colors (Black/White).
Sets the color space to be used for the BMP image format output.