Enum/StartCorner) determines from which corner the grid starts laying out UI elements. The grid continues in the
UIGridStyleLayout/FillDirection, filling elements one by one until
UIGridLayout/FIllDirectionMaxCells cells have been laid out in that row/column or if all the parent UI element’s space has been occupied by previous cells.
Above, the potion is the first
ImageLabel, followed by the gem and the sword. The UIGridLayout is using a
Enum/StartCorner of BottomRight. The
UIGridStyleLayout/FillDirection is Horizontal.