$ cat pm_11145036_parm_defaults.json { "margin-left" : [ null, "margin-horizontal" ], "margin-right" : [ null, "margin-horizontal" ], "margin-top" : [ null, "margin-vertical" ], "margin-bottom" : [ null, "margin-vertical" ], "margin-horizontal" : [ null, "margin" ], "margin-vertical" : [ null, "margin" ], "margin" : [ 10, null ] }