Compressing Limited Colour PNG images

Most of the .PNG files on this site are the ‘blueprint’ style diagrams, like this one:

Blueprint style diagram showing an optical microscope. The sample inside is magnified in a bubble to 2,500 times, showing it to be a complex, detailed paisley pattern.

This illustration is a large 5.6MB SVG file, mostly because of the very detailed paisley pattern that I used.

Exported to PNG - and then compressed using the process below, you can get this down to 118.5kB.

I create these in Inkscape as vector .SVG files & export them to bitmap .PNG files. I then re-compress them, to ensure ...


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Thunar's icon, a beautifully rendered, stylized version of Thor's hammer, Mjölnir.

Thunar - XFCE & XUbuntu’s small but perfectly formed file manager - has a simple mechanism that allows you to easily add new commands to the right click menu of files and folders. These are called Custom Actions and are easy to create… here’s how to do it.

Click the Edit menu, then click ‘Configure custom actions…‘. This will take you to the Custom Actions Manager, where you can create, edit or delete your custom actions.

You can enter anything into ...


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