EurekaLog Viewer's Configure columns window:
This window is invoked from main window by selecting "Configure"/"Columns" command from toolbar:
Note: the toolbar is configurable, if you can't see this button - then you need to reconfigure toolbar and add this button).
Right after invoking, the right column contains all columns that were displayed in report's list at main window.
The left column always contains list of all available columns.
You can use buttons with arrows to change visibility of columns or just simple drag&drop columns from one list to another. ">" and "<" buttons move only selected columns around. ">>" and "<<" buttons move all columns from one list to another.
You can also use Shift or Ctrl keyboard's buttons to select multiple columns.