This screenshot shows the Advanced Alert Condtion area of the Create Alert Rule dialog box. The text says, "Enter a valid Boolean condition under which an alert should be raised. You may use any of the constructs below. Please ensure that the condition is syntactically correct, that it contains only the attributes listed below, and that all values entered are valid."
From top to bottom, its contents are the following:
Select an event to insert in the condition list
Select an attribute to insert in the condition list