Preferences/Settings in Eduard
On macOS 12, choose Eduard (at the top-left of your screen) > Preferences, and on macOS 13 choose Eduard > Settings.
Window Background is the gray value between 0 and 255 of the window outside of a shading.
Grid for Void Values is the gray value between 0 and 255 representing .
General: Zoom and pan
Scroll Wheel: If you are using a mouse with a scroll wheel, select whether scrolling zooms in or out or moves the shading up or down.
Two Fingers on the Trackpad: If you are using a trackpad, select whether moving two fingers simultaneously in vertical direction zooms in or out or moves the map up or down (when zoomed in).
See for information.
Store shading settings in for later use.
Store for later use.
Select the that opens when you click on the map toolbar button or choose Grid (at the top of your screen) > Show Grid Area in Map.