This is the icon names program originally created by Jeremy Francis of Intel a few years ago. Updated a bit for JMP 10, 11 and 12. You can use the icon names in Application Builder to add icons to button boxes. Or you can use them in JSL as shown in the following example:
nw = new window("Icon Names",
text box("Here are some button boxes with icons"),
lineup box(ncol(1),
bb1 = button box("TreeMap"),
bb2 = button box("Surface Plot"),
bb3 = button box("Filter"),
bb4 = button box("Exit", nw << close window),
),
bb1 << set icon("TreeMap"),
bb2 << set icon("SurfacePlot"),
bb3 << set icon("Filter"),
bb4 << set icon("Stop"),
);
This produces the following output:

Here's the output for the addin:

I think this is a Windows style. The 2015 screenshots were an earlier version of Windows.
We're using Windows 11 now and I get the same thing:

Hi @pmroz, the buttons in your screenshots look nice (with the slightly round edges).
On my computer they look like this:

Are there some settings in the preferences to toggle between the variants?
I couldn't find them ...
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />Thanks Peter. No need to send this to me directly now. I appreciate you providing this. Very useful.