[help]Black outline to the text

[Taquito]

I'd like to ask for help, I have this text in the left bottom corner

mapdisplay = dxText:create('#aeaeaeMap: none', 2, screenHeight - dxGetFontHeight(0.7, 'bankgothic')/0.5, false, 'bankgothic', 0.7, 'left'), 
            nextdisplay = dxText:create('#aeaeaeNext map: none', 2, screenHeight - dxGetFontHeight(0.7, 'bankgothic')/1, false, 'bankgothic', 0.7, 'left') 

And I'd like to add some black outline to this text, how do I make it?

[GTX]

mapdisplay:type('shadow', 2, 0, 0, 0, 255) 
nextdisplay:type('shadow', 2, 0, 0, 0, 255) 

Or

mapdisplay:type('stroke', 2, 0, 0, 0, 255) 
nextdisplay:type('stroke', 2, 0, 0, 0, 255)