<col>

Defines the attribute values for one or more columns in a table

Legend

These give hints, nothing more. Their presence is explained at tip collection for this tag:

XRequired attribute in (x)html
Required attribute in (x)html. Use it.
AAccessibility requirement
Required and/or recommended attribute or value for an accessible site. Use it.
?Alert!
This attribute or value has issues. Check tip page for reason and alternatives.
‼Cool!
Just cool; real enhancement when used here.
html attributes for <col>
css properties applicable to <col>

Clip function works in ? (Its been a while, it probably doesn't work any more).