Create a Grid canvas
Preconfig > Canvas⚓
Select a Screen.
Select the Grid canvas type.
Enter the number of columns and rows for the Screen Grid.
If needed, enter the size for the empty cells of the grid (in pixels).
The canvas is updated with the corresponding values and the total Screen size is indicated.
In the Tree view, click an output group and use drag and drop to assign it to a grid cell in the canvas.
OR
Go to Group Canvas in the right panel and set its position using the Column and Row settings.
In Group Format, set a format for every output in the group.
In Group Pattern, display patterns to identify the outputs.
Repeat steps 5 to 7 for all outputs / output groups.