(Translated by https://www.hiragana.jp/)
Marking tips
The Wayback Machine - https://web.archive.org/web/20190909134351/http://pub.stat.ee:80/px-web.2001/Dialog/mark1.asp

                                                                                                                             Explanation of symbols

"..", "...." etc. before the value of the variable in the selection box means that we have to deal
with the subvalue of the previous value in the meaning of "of which".
To avoid misinterpretations we recommend to choose such values together with the value of the previous level.

About making selections in a list box

1. To select all lines in a list box
    Mark the first line in the list box. Then press Shift and End simultaneously.
 
    Mark all lines by pressing the button  .
 
2. To select more than one line in a list box
     Mark lines in a list box by clicking the left mouse button and dragging it over the requested lines,
     or mark one line on your list and then press Shift at the same time as you press the up or down arrows on the keyboard.
 
     Mark several lines by pressing Ctrl at the same time as you click the left mouse button on the requested lines.
 
3. To deselect one line in a list box
     Press Ctrl and click the left mouse button on the selected line simultaneously.
 
4. To deselect all lines in a list box
     Press the button  .
 
5. To select a specific value in the list box
     Type text in search field and press the button  .
      All the lines containing the text will be marked.
 
     To limit searching to the beginning of the line, type text in seach field,
     mark the box start of line only and press the button .
 
Updated: 02.02.2006