This folder contains images in svg format that can be used as a basis for create component modern images for SynEdit components and highlighters.
You can use the SVG Text Editor which is part of SVG Shell Extensions to create/edit svg files for the various components and then generate the required png files. See `TSYNSPELLCHECK.svg' for an example. The png files need to be trasparent and use colors that display reasonably well in both dark and light backgrounds.
The generated png files then need to be inserted into the resource file `SynEditReg.dcr'. You can use Resource Hacker to do that.
This article by David Millington contains information about the use of png files as component images.