Please do contact us if this does not help: When you switch from or to windowless mode app window does not change position at all, it only becomes transparent o

Please do contact us if this does not help: When you switch from or to windowless mode app window does not change position at all, it only becomes transparent or not. Zen Timer uses normal window so it has to be visible in Mission Control. As a last resort, you can use 'Center and Reset Position' menu option that can be found in Window menu when Zen Timer has the focus.