General Tab

The few items could stand to be more centered in the window. The actual on top, mine beneath.

What happened to the Color tab? The one setting in the Color tab (Preferred Color Management Module) can be moved to General.

Images Tab

More centered in the window and the scaling setting allows for numerical input of a default percentage (set to 100% by default).

PDF Tab

Haphazard sums it up nicely.

Radar Bug #4417648