When controlling as ATC you get a screen such as below. The right-part of the screen shows all aircrafts you are controlling, and below the history of the communication.
When controlling during a quiet period, a big part of the right area of the screen is not used. This empty space could be used by having a larger history area…
Would it perhaps be an idea to create an ability that enables the ATC to move the split-bar between these two areas? This would allow him to decide on the size of these areas and which areas he wants to scroll.