hover over the icon in the field to get more info on the property. Use "ctrl+enter" or "cmd+enter" to add a new field

drag the field to one of the gray boxes (using the handle on its left)

try to discover the missing character from the expression. Use "alt + N" to try a new one

drag the field wherever you want on the screen to create a new one

write " :: " in the field to add aliases

Text field icon representing the property in use