While trying to work out the floorboard distribution for the study floor, I drew a rectangle representing the room shape. I then created individual components representing the different length boards I have to play with and then moved them one by one onto the initial rectangle until the floor was 'finished'.
To help me lay them down, I thought I'd colour the various lengths with different colours but sometimes the colour of the room outline overrides the colour of the floorboard. I'm not really sure what is happening here. Surely if I move something on top of something else then the colour of the moved object should 'override' that of the object underneath ?