textXpos = 300;

textStr1 = "Text\nLeft justified";
textYpos1 = 100;

textStr2 = "Text\nLeft justified";
textYpos2 = 200;

textStr3 = "Text\nRight justified";
textYpos3 = 300;

textStr4 = "Text\nRight justified";
textYpos4 = 400;

run("Boats (356K)");
setFont("Serif", 36, "antialiased");

makeText(textStr1, textXpos, textYpos1);
run("Properties... ", "name=test stroke=red justification=Left fill=none");
Overlay.addSelection(); //correct position

makeText(textStr2, textXpos, textYpos2);
run("Properties... ", "name=test stroke=red justification=Left fill=blue");
Overlay.addSelection(); //correct position

makeText(textStr3, textXpos, textYpos3);
run("Properties... ", "name=test stroke=yellow justification=Right fill=none");
Overlay.addSelection(); //wrong position

makeText(textStr4, textXpos, textYpos4);
run("Properties... ", "name=test stroke=yellow justification=Right fill=blue");
Overlay.addSelection(); //correct position

run("Select None");
Overlay.show;
updateDisplay;