HTML offers two methods to accomplish this task. element with a width large enough to span the combined widths of the columns placed into it. Then open a table row tag. After this tag, enter an ...

there are three tiers of coloring in tables, to be placed into each cell of a header row (use inline HTML "colspan=#_of_rows_spanned" to make a header row).

Right-click a cell in the table column next to where you wish to insert the new column. A list of shortcut options will display. Point over "Insert" to open a list with two options: "Table Columns ...