Aligning text
From JSXGraph Wiki
Texts can be aligned with the attributes anchorX and anchorY. Possible values for anchorX are 'left', 'middle', right'. Possible values for anchorY are 'bottom', 'middle', 'top'.
The underlying JavaScript code
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox: [-1,10,7,-1], axis:true, keepAspectRatio:false});
brd.create('line', [-3, 1, 0], {strokeWidth:1, dash:2});
brd.create('text', [3, 8, "Default"], {cssClass:'mytext'});
brd.create('text', [3, 7, "anchorX left"], {anchorX:'left', cssClass:'mytext'});
brd.create('text', [3, 6, "anchorX middle"], {anchorX:'middle', cssClass:'mytext'});
brd.create('text', [3, 5, "anchorX right"], {anchorX:'right', cssClass:'mytext'});
brd.create('line', [-2, 0, 1], {strokeWidth:1, dash:2});
brd.create('text', [1, 2, "Multiline text<br>default"], {cssClass:'mytext'});
brd.create('text', [2.2, 2, "Multiline text<br>anchorY bottom"], {anchorY:'bottom', cssClass:'mytext'});
brd.create('text', [3.4, 2, "Multiline text<br>anchorY middle"], {anchorY:'middle', cssClass:'mytext'});
brd.create('text', [4.6, 2, "Multiline text<br>anchorY top"], {anchorY:'top', cssClass:'mytext'});