04-04-2020, 06:25 PM
Untick everything and give it a try. As before it might not be your image but could be the blogsite rendering engine. Whatever background you use will be ignored. If you post a png here it displays with a white background not transparent.
Regardless I would untick all the metadata (1) and while AFAIK automatic pixel format (2) gives a 8 bit RGBA image, nothing lost by setting that explicitly.
This comparing an image from a web page in Gimp with the web page open in a browser.
Size? Gimp works in pixels (3) so at 100% zoom should be correct size. If you look at the properties of an existing image as above, the resolution is 72 ppi. That value came from old CRT monitors. Still there in Gimp if you look at the File -> New templates, there is a block of Web banner sizes, all at 72 ppi. Vector applications such as Inkscape might use 90 or 96 ppi but it is worth checking what you have set.
Other than that - don't know, post your png banner here somebody might find a problem with it.
Regardless I would untick all the metadata (1) and while AFAIK automatic pixel format (2) gives a 8 bit RGBA image, nothing lost by setting that explicitly.
This comparing an image from a web page in Gimp with the web page open in a browser.
Size? Gimp works in pixels (3) so at 100% zoom should be correct size. If you look at the properties of an existing image as above, the resolution is 72 ppi. That value came from old CRT monitors. Still there in Gimp if you look at the File -> New templates, there is a block of Web banner sizes, all at 72 ppi. Vector applications such as Inkscape might use 90 or 96 ppi but it is worth checking what you have set.
Other than that - don't know, post your png banner here somebody might find a problem with it.