The Title Bar Double-Click trigger allows you overriding the default maximize/restore window behavior with the following actions:
Make Transparent - toggle between current and user-defined transparency levels: double-click once to set the user-defined transparency level and then double-click again to restore the previous transparency level.
Roll Up - toggle between current and its opposing rollup states. For example, if window is currently rolled up then double-clicking it once will unroll the window and then double-clicking it again will rollup the window back - and vice versa.
