Hi everyone; I’ll throw myself in here… and thanks Jim for the shout out.
So what do you need if you are going to create a theme yourself?
You cannot change the headers via options… and a whole lot of other things.
So you want to pick the theme which as the color dividing lines and small icon outlines you want; as you cannot change those without decompiling the entire scrivener app.
If you now say huh? and is genuinely curious; follow the link to my theme above, posted by Jim; there’s a discussion with the Scrivener dev team there which explains it in detail.
So–armed with your desired dividing lines and icon outlines; you’ll need a few tools… and a couple of skills.
But first–the main icons also cannot be changed; but the good news? Everything else can.
You will need a passing level of knowledge of CSS. That’s pretty much it.
And you will need a coding environment which can read .pal files, .qss, and XML.
Those are the only three files you will be editing; as the preferences file, you would edit from within Scrivener by setting your options.
My Go-to is Visual Studio Code for this, which has a dizzying array of plugins of every kind available, and is completely free of charge. There are of course a bazillion Dev environments out there.
So how about this? Let’s get more themes than Firefox has shared on this forum. 