How to choose from the list box
It is necessary to select at least one item from each list box (variable)  

Number of items selected:

• It is possible to select many items from each list.
• To choose non-contiguous items in the list; hold down the [CTRL]key and use the mouse (left-click) to highlight individual items.
• To choose a range of contiguous items; select the first item and while holding down the [SHIFT]key, select the last item. All items within this range will be selected.

• Click on the Select all button
• Select the first item and drag while holding down the mouse button.
• Select the first item and hold down the [SHIFT]key while pressing the [END]key.
• Select the first item, hold down the [SHIFT]key and select the last item.

• If search options are not visible click on Text search.
• Write a search string and click on . The programme highlights the items that include the search string.
• If "Starts with" is selected, the programme highlights only those items that start with the search string