Created attachment 102426 [details] adapted c syntax highlighting file for arduino sketches The .ino extension is used for arduino sketches which basically contain c++ code that pretty much looks like c with a builtin bool type. The Arduino IDE has some syntax highlighting but is quite useless as a text editor. I have attached a simple edit of the c.xml syntax highlighting file from here: https://kate-editor.org/syntax/5.28/ I hope this can be improved upon and maybe added to the long list of supported highlighting styles. If there is anything I can do to improve the syntax highlighting, let me know.