How to Show/Expand or Hide/Collapse a Column or Sub-Column

To collapse or expand a Column, click anywhere in the grey Column header area.  Collapsing/Expanding a Column with Sub-Columns will collapse/expand to show all child Sub-Columns.

To collapse or expand a Sub-Column, click anywhere in the grey Sub-Column header area. 

Note: Top level Columns (Planning, Ready to Do, Work in Progress, Done, Archive) do not expand or collapse on their own.  They automatically change width based on the Columns and Sub-Columns contained below.

Note: Internal Columns cannot be individually collapsed or expanded.  Internal Columns act like a divider or internal filing system to help keep the order of cards within a column or sub-column, particularly when there is a large quantity of cards.