Macro Language Reference > PIs > Tables > <?tbmdt>
  
<?tbmdt>
Description
This command allows you to specify a top drop which will occur whenever a table is at the top of a column. The definition of column top is the same used for paragraph column top margins — the top of a frame column, the top of a cell when the parent table is of overflow type 3 or <?tbsimcol> is in effect, or following a "break across columns" setting.
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Note that this top drop is applied in addition to top margins set via either <?tbmt> or <tbmct> and occurs mid-table as well as at the top of a table. This in particular gives you control over where headers occur in relation to the top of a column.
This command can also be specified <?tbdroptop>.
Syntax
<?tbmdt height:uh>
height
The height of the margin, with optional decimal point and optional unit of measurement.