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Slider Pointer Increment Size

I would like to use the Slider as a pointing device for text wither within a TextBox or against free Text.
In this case as a character counter. I'd like the spacing to match of course.

<div id="a1">Slider value is 1</div>
<script>
    //slider onChange handler
    function my_func(pos,slider){
        document.getElementById("a1").innerHTML="Slider value is "+pos;
    }    
    var slider=new dhtmlxSlider(null, 500);
    slider.attachEvent("onChange",my_func);
    slider.setSkin("arrow");
    slider.setMin(1);
    slider.init();
</script>
   <input id="input1" size=50 style="font-family:'Courier New', Courier, mono;font-size:10px;" type="text" value='1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ'>

Likely I will need to use a fixed-font in the HTML text. But can the Slider's pointer increment size be fixed as well (to match)?
Can this be done reliably?

>>But can the Slider's pointer increment size be fixed as well
You can define "step" size for the slider, so slider will round any value to the steps

slider.setStep(8);
slider.setValue(63)
alert(slider.getValue()) // 64 <= rounded to step size