A Fixture Group defines the physical grid arrangement of heads that an RGB Matrix uses as pixels

A Fixture Group maps individual fixture heads onto a 2D grid. When used with an RGB Matrix function, each cell represents one pixel. The Fixture Group Editor lets users place heads by rows and columns matching the physical layout of an LED wall or pixel array. Heads can be swapped and gaps created. An LED bar with 4 RGB segments becomes 4 heads each occupying one cell; arranging multiple bars creates an addressable pixel canvas.

Examples

Eight 4-cell LED bars mounted as 8 rows of 4 columns form a 4×8 pixel grid for text scrolling via RGB Matrix.

Assessment

You have 12 tri-color PAR cans in a 3×4 grid. Describe the steps to create a Fixture Group for this layout so an RGB Matrix can render text across them.