This affects only horizontal boxes with at least one baseline
aligned child. If there is more vertical space available than
requested, and the baseline is not allocated by the parent then
@position is used to allocate the baseline with respect to the
extra space available.
Sets the baseline position of a box.
This affects only horizontal boxes with at least one baseline aligned child. If there is more vertical space available than requested, and the baseline is not allocated by the parent then @position is used to allocate the baseline with respect to the extra space available.