Columns may be rearranged by dragging column headings left or right.
Resize columns by dragging the right edge of a column header.
Columns may be hidden by dragging the edge to a zero width. Hidden columns will be indicated by the presence of a slightly wider header divider line.
To un-hide a column, position the cursor to below the mid-point of the hidden column indicator. The cursor will change to a diagonal arrow to indicate hidden column resizing mode.