Perfect! Thanks very much! I will have my work cut out for me I'm sure, but I enjoy this kind of stuff, stay tuned!

  https://cinelerra-gg.org/download/CinelerraGG_Manual/How_Create_new_Theme.html

You can ignore the technical programming rhetoric and start reading at "The easy way..." for this and the next 2 paragraphs.

So, being the most recent, I would start by making a copy of the directory of:

    {your cinelerra location}/plugins/theme_cakewalk

and let's just call it "theme_diehard" and start from there with the main program cakewalk.C renamed to diehard.C and then start editing to change any "cakewalk" names to "diehard" names.  You will see in the directory you copied, a subdirectory called "data" and this is where the customized buttons go.

The big gotcha is that you MUST be able to actually build (compile) Cinelerra itself in order to test but, of course, probably Andrea and I can test too.

I have my own custom colored "Diehard" system theme I have created for the Distro I maintain (AV Linux) and recently I adapted the colors to make a new color theme for the Ardour DAW (image below). Because I'm a weirdo and would like to learn something new I would be interested in tweaking the wonderful "Cakewalk" Cinelerra theme to the Diehard colors as well. Many years ago I did some minor work on the 'Cinecutie" theme but Cinelerra has changed a lot since those days and as I recall I had to compile the image files into theme assets, is there any kind of theme 'framework' for Cakewalk to get started from?