Full Screen Tint

If the Ruler size slider is set to the full level, the Ruler will colour or tint the whole screen. So it becomes a full screen overlay.

When this takes effect, the background colour Above and Below the ruler will not be visible.

Move Slider to full position to activate full screen colour/tint. Example of a full screen overlay tint with pink colour shown below.

A full screen tint or colour can be modified by choosing the Ruler Colour icon and selecting as in Set Ruler Tint help page