Use ATTRPRIORITY=NONE in the ODS GRAPHICS options like this   ods graphics / attrpriority=none; proc sgplot data=sashelp.stocks; where stock ne "IBM"; series x=date y=close / group=stock; run; ... View more

The blank space you have around the graph is outside the definition of the graph.  Check your ODS RTF destination or any ODS LAYOUT settings.  Also, I suggest you could use the LOWLABEL of the HighLow plot itself for the subject id.  Or, an AxisTable. ... View more