The list is a tree diagram of all the variables in the code. At the top level the list shows all the subroutines in the code in the order they  are declared. Local variables are contained in the folder under each subroutine. Global variables are located in the Global folder at the bottom of the list.

Check Boxes. Each item in the list has a check box to its left. Checking the box adds that variable to the watch list. Checking a subroutine box adds all variables in the subroutine to the list. Unchecking a box removes the corresponding variables from the list.

Toolbar. The toolbar on the left lets you  check or clear multiple variables at one time. Here is a description of each button:

Variables can be highlighted in groups using the Ctrl and Shift keys. With the Ctrl key down, clicking on a variable will highlight it without unhighlighting any other variable. With the Shift key down, clicking on a variable will highlight all intervening variables between the last highlighted variable and the current one.

Status Display. The status display provides technical details about the currently highlighted variable. This includes the corresponding Procedure Name, the Variable Name, the Scope of the Variable in I2L Program Counter values, the Level and Offset of the variable and its data type.