This command inserts an additional assignment into an existing assignment. This capability serves the placement of so-called assignment combs; i.e., the assignment of the value presently located at the line to several variables.
If you select the lined cross above an assignment (Cursor Position 5) or the output directly in front of it (Cursor Position 4), then there will be another assignment inserted after the ones already there.
If the line cross directly in front of an assignment is selected (Cursor Position 4), then another assignment will be inserted in front of this one.
The inserted output is allocated with the text "???". This text must be clicked and changed into the desired variable. For this you can also use the input assistant. For the possibility to enter an address instead of the variable name please see the description of the options dialog.