(Sorry about the width. I don't know why this forum software
wants to leave so much open space right of a picture.)

XBoard on my Ubuntu system, with the engine-output, move-history and eval-graph window open. My preferred layout leaves some open space for the game list, if there is one.
And one made by Miguel (stolen from the other thread.)

XBoard while using the Engine #1 Settings dialog to configure the engine, using custom bitmaps for the pieces.