I’m using Bimuth window decoration theme. You can also toggle that setting for specific windows with Plasma in System Settings/Shortcuts/Kwin/Toggle titlebarandwindow frame (or something like that, I use this in Spanish). You can also customize this configuration per application.
how did you got rid of the huge terminal top border, please, I need more terminal per terminal.
I’m using Bimuth window decoration theme. You can also toggle that setting for specific windows with Plasma in
System Settings/Shortcuts/Kwin/Toggle title bar and window frame
(or something like that, I use this in Spanish). You can also customize this configuration per application.