Hello Prepare list of keywords, reserved words, file types e.t.c. Go to menu settings / User highlighter and create new Solidity highlighter - select comment style, string style, insert lists of keywords e.t.c. and save it. Note: if you installed PSPad into program files, run it as administrator to allow write access to PSPad Syntax subfolder.
When new highlighter definition is saved, you can start PSPad normally. Open menu Settings / Highlighter settings, click on any free slot on the bootom of highlighter list, check it and on the second page assign your new solidity syntax. -- <https://forum.pspad.com/read.php?6,74365,74366> PSPad freeware editor https://www.pspad.com
