I just built the new KDE5 from ports using
So I typed
portmaster kde5
and there was only Compositor under System Settings / Display & Monitor when it finished. pkg info plasma5-kscreen
said it wasn't installed. Hmmm. The Displays panel is kind of essential for a laptop with external display. Yeah, I could just use xrandr, but I just spent all day building a monster DE.....So I typed
portmaster plasma5-kscreen
but it (re)installed plasma5-kscreenlocker. make install plasma5-kscreen
in /usr/ports/x11/plasma5-kscreen/ builds and installs the Displays settings panel.