| UI Elements | E | The UI elements to place in the grid. Each path branch will form a column of the provided UI Elements from top to bottom. | Generic Data |
| Grid Membership | M | List of index numbers to place elements in different Grids. List length must match the number of Element paths. | Integer |
| Width | W | The width of the grid | Number |
| Height | H | The height of the grid | Number |
| Row Definitions | RD | An optional repeating pattern of Row Heights - use 'Auto' to inherit, numbers for absolute sizes, and numbers with * for ratios (like 1* and 2* for a 1/3 2/3 split) | Text |
| Column Definitions | CD | An optional flat list of Column Widths - use 'Auto' to inherit, use numbers for absolute sizes, and numbers with * for ratios (like 1* and 2* for a 1/3 2/3 split) | Text |