Every INTERACT document shows at least one column. The width of all columns can, of course be, changed.
Manually
You can adjust the width of each column separately, by moving the mouse upon the vertical column border, in the column header, and 'drag' the border to the required position.
Automatically
To automatically adjust the width of all columns,
▪Click View - Document - Optimal Width 
, to optimize your column width.
INTERACT now toggles between:
 | Maximize - the column width is altered to fit all columns into the window. |
| Optimize - the column width is adjusted to fit the column header text. |
How to change the column order is explained in Add, delete or move class columns.