Define Table Header for Mardown Table of +---+---+ Markup Type

Question

What markup should be used to turn the first row into a table header?

+-------+----------+-------------------------------------------------+
|  Bits |   Field  |                   Description                   |
|       |   Name   |                                                 |
+-------+----------+-------------------------------------------------+
| 31:28 |  FORMAT  | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
+-------+----------+-------------------------------------------------+

Answer 1

That appears to be Pandoc's grid_tables. The header should be separated from the body by =, like this:

+-------+----------+-------------------------------------------------+
|  Bits |   Field  |                   Description                   |
|       |   Name   |                                                 |
+=======+==========+=================================================+
| 31:28 |  FORMAT  | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
|       |          | Indicates size of data type in buffer in bytes  |
+-------+----------+-------------------------------------------------+