The height of the Sensory Ruler is controlled by the size slider on the toolbar. Drag left for a narrow ruler and right for a taller one. At its maximum position, the ruler expands to cover the entire screen as a full-screen colour tint.

Adjusting ruler height

Sensory Ruler for Mac toolbar showing the size slider control

Drag the slider to set the ruler to the height that best suits your reading. The ruler updates in real time as you drag.

Narrow, medium, and full-screen examples

The three screenshots below show the ruler at different heights — from a narrow strip to a medium height to full-screen coverage.

Narrow ruler — a thin strip useful for following a single line of text.

Sensory Ruler for Mac set to narrow height, showing a thin coloured strip across the screen

Medium ruler — covering roughly a third of the screen, useful when reading longer paragraphs or for users who find a larger focus area helpful.

Sensory Ruler for Mac set to medium height, covering approximately one third of the screen

Full screen tint — the slider moved to maximum, covering the entire screen with a colour overlay.

Sensory Ruler for Mac with slider at full width, providing a full-screen colour tint overlay

Full-screen tint mode

When the slider is at its maximum position, Sensory Ruler becomes a full-screen colour overlay. In this mode:

  • The above and below background tint areas are not visible (the ruler covers the whole screen).
  • The ruler colour you have set is applied across the entire display.
  • This is useful as a screen tinting tool similar to Sensory Tint for Windows.
Sensory Ruler for Mac toolbar with the size slider moved to the maximum position for full-screen tint
Tip: To customise the full-screen tint colour, set the ruler colour first using the colour icon, then drag the slider to maximum to apply it across the whole screen.