-| Command | Params | Meaning |
-| :------------- | :----- | :------------------------------- |
-| [Space][Space] | Label | Mark a location in the program |
-| [Space][Tab] | Label | Call a subroutine |
-| [Space][LF] | Label | Jump unconditionally to a label |
-| [Tab][Space] | Label | Jump to label if TOS is zero |
-| [Tab][Tab] | Label | Jump to label if TOS is negative |
-| [Tab][LF] | --- | Return from subroutine |
-| [LF][LF] | --- | End the program |
+| Command | Params | Meaning |
+| :------------------- | :----- | :------------------------------- |
+| [Space][Space][VTab] | Label | Mark a location in the program |
+| [Space][Tab] | Label | Call a subroutine |
+| [Space][LF] | Label | Jump unconditionally to a label |
+| [Tab][Space] | Label | Jump to label if TOS is zero |
+| [Tab][Tab] | Label | Jump to label if TOS is negative |
+| [Tab][LF] | --- | Return from subroutine |
+| [LF][LF] | --- | End the program |