Dodge/Burn exposure setting - Shortcut Keys?

The software of such keyboards rarely allows you to realize all your desires, so third-party software and various tricks are indispensable (I write as someone who has been using the XK-12 Jog & Shuttle for about 10 years). 

You can write a script that will iteratively increase or decrease the exposure value (the script can be hung on a hot key in Photoshop and activated from the keyboard)

/**
 * increase exposure value:
- regular launch +1%
- launch with the shift pressed + 10%
 */
#target photoshop;
var s2t = stringIDToTypeID,
    t2s = typeIDToStringID;
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('tool'));
r.putEnumerated(s2t('application'), s2t('ordinal'), s2t('targetEnum'));
var tool = executeActionGet(r);
var t = t2s(tool.getEnumerationType(s2t('tool')));
if (t == 'burnInTool' || t == 'dodgeTool') {
    var cur = tool.getObjectValue(s2t('currentToolOptions')).getInteger(p = s2t('exposure'));;
    (d = new ActionDescriptor()).putInteger(p, ScriptUI.environment.keyboardState.shiftKey ? (cur + 10 > 100 ? 100 : cur + 10) : (cur + 1 > 100 ? 100 : cur + 1));
    d.putBoolean(s2t('useScatter'), tool.getObjectValue(s2t('currentToolOptions')).getBoolean(s2t('useScatter')));
    (r = new ActionReference()).putClass(s2t(t));
    (d1 = new ActionDescriptor()).putReference(s2t('target'), r);
    d1.putObject(s2t('to'), s2t('target'), d);
    executeAction(s2t('set'), d1, DialogModes.NO);
}


/**
 * decrease exposure value:
- regular launch -1%
- launch with the shift pressed -10%
 */
#target photoshop;
var s2t = stringIDToTypeID,
    t2s = typeIDToStringID;
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('tool'));
r.putEnumerated(s2t('application'), s2t('ordinal'), s2t('targetEnum'));
var tool = executeActionGet(r);
var t = t2s(tool.getEnumerationType(s2t('tool')));
if (t == 'burnInTool' || t == 'dodgeTool') {
    var cur = tool.getObjectValue(s2t('currentToolOptions')).getInteger(p = s2t('exposure'));;
    (d = new ActionDescriptor()).putInteger(p, ScriptUI.environment.keyboardState.shiftKey ? (cur - 10 < 1 ? 1 : cur - 10) : (cur - 1 < 1 ? 1 : cur - 1));
    d.putBoolean(s2t('useScatter'), tool.getObjectValue(s2t('currentToolOptions')).getBoolean(s2t('useScatter')));
    (r = new ActionReference()).putClass(s2t(t));
    (d1 = new ActionDescriptor()).putReference(s2t('target'), r);
    d1.putObject(s2t('to'), s2t('target'), d);
    executeAction(s2t('set'), d1, DialogModes.NO);
}

Unless the device is able to emulate a mouse-click that activates one of those fields I don't think it's possible. Those controls are contextual and the up/ down keys to change values only work when the tool is active and the input field is active. For most tools you can directly type in values into whatever is their default active parameter field, though, so perhaps make it a habit to do it that way.

Mylenium