He sketched his idea on the use of the slider scale in CPN
Such a decision could be an alternative to the standard zoom buttons and nice to be controlled with the touch screen
Slider stretched, removed the background and the title.
Added zoom button (+) (-)
6 steps to quickly switch the scale Overview, General, Coastal, Approach, Harbour, Berthing and 7 Steps intermediate scales
Horizontal and vertical layout
When you switch the slider or use the zoom buttons (in vertical mode) to the left of the slider box appears white with a digital zoom value, after pressing the white box disappears.