• Select the "Pin" checkbox.
  Now the grille will stay steady, and any tune will be caught by eyes - even the smaller changes like color shades and opacity.

• Drag the Gauge slider to change the gauges' thickness.
• Click on gauge color well and select a new color. Note there is an opacity slider in the color panel.

• Drag the Aperture slider to change the aperture size.
  Note there are two numbers at the right slider's side: the 1st is the horizontal or vertical size of the aperture, and the 2nd is the thickness of the gauge. The sum of both numbers is the step of the grille.

• Gauge thickness: bound to the Gauge slider.
• Aperture width: bound to the Aperture H slider.
• Aperture height: bound to the Aperture V slider.
• Horizontal step: the sum of the gauge thickness and the aperture width.
• Vertical step: the sum of the gauge thickness and the aperture height.

The following formulas describe dependences between the measures above:

• Horizontal step = aperture width + gauge thickness
• Vertical step = aperture height + gauge thickness

• Deselect the "Offset from mouse" checkbox.
• Unpin the grille: deselect the "Pin" checkbox.
• Move the mouse slowly.
  Note the grille will follow the mouse.
• There are two gauges - one horizontal and another vertical - that cross the mouse position all the time. They are called mouse gauges, and their crosspoint is the mouse crosspoint.

• Pin the grille.
• Change the gauge thickness.
  Observe the change of the grille step.
• Change the aperture size.
  Once again, observe the change of the grille step.
  Note both mouse gauges are immovable.

It's all about the positioning of the grille. In fact, the positioning is just an alignment of:

• One gauge - horizontal or vertical.
• Two gauges - horizontal and vertical.
• A crosspoint of horizontal and vertical gauges.

In general, it doesn't matter which gauge or crosspoint will be aligned. However, there are two cases when the mouse gauge or the mouse crosspoint has to be aligned:

• When resizing the grille after it has been pinned.
• Positioning according to mouse coordinates.

When aligning mouse gauges or crosspoint, please follow the strategies below:

• Positioning the grille according to mouse coordinates.
  • Toggle off the Offset from mouse.
• Positioning the grille according to a point in a processing object (UI Form, Drawing, etc.).
  • Toggle on the Offset from mouse. Set one or both sliders to "-5"."
    The rule is to make the mouse gauge or crosspoint visible aside from the mouse.
• Positioning the grille according to the boundaries of an object.
  • The value of the Offset checkbox is not a concern.

Open the grille preferences panel and click on the Restore defaults button.