Use this dialog box to customize the columns display in the TimeLiner Tasks tab. To access it, click Columns 
drop-down 
Choose Columns on the Tasks tab.
- Column List
- Displays all the available columns. Click a column check box to select it for display in the Tasks tab.
- Move Up
- Moves the selected column(s) up the list by one place.
- Move Down
- Moves the selected column(s) down the list by one place.
- Show All
- Selects all check boxes in the list.
- Hide All
- Clears all check boxes in the list.