UPDATE 2 – its time for the 2019 update on this one… If you’re looking to find out the Twitter banner size, or something similar,…
Twitter Header Image Size / Dimensions
PNG
PNG is an image file storage system, which is a raster graphics file format.
What does PNG Stand For?
PNG stands for Portable Network Graphics.
Lossless Compression Gif Replacement
The format can be losslessly compressed, and was first created as a non-patented replacement for GIF.
How to convert colours to black in images using ImageMagick
If you want to convert PNG (or similar) files containing, for example, icons which are in one colour (say green) to black, then the command…