GridBaseline is an option for GridBox which specifies where the baseline of the grid represented by the GridBox should be assumed to be.
GridBaseline determines how a GridBox will be positioned vertically with respect to other boxes, say in a RowBox.
GridBaseline->pos specifies that position pos in the GridBox should be assumed to be the baseline of the GridBox and should therefore be aligned with baselines of other boxes.
Possible settings are:
A setting of pos, i, j specifies that the position pos in the i, j element of the GridBox should be assumed to be the baseline for the whole GridBox.
See Section 2.9.11.
See also: RowAlignments, AdjustmentBox, CellBaseline.
New in Version 3; modified in 5.0.