You can display a target on the experimenter/operator's screen, the subject screen, or both. To do so, you have to modify the 2nd element of a vcode.
The valid values for vcode(2) are:
0 - Do not display target
1 - Show target on the subject and operator display
2 - Show target on the subject display only
3 - Show target on the operator display only
To display a number, you need to use a target with a label. The ASCII values of your number would go to elements 16-65 in the vcode.
In this sample task, I look at lot of dynamic numbers (positions and angles, mostly) and display them, so you can take a look at that code: https://kinarm.com/download/robot-data-visualization-demo/
As well, for more documentation on what I've discussed and other functionality of vcodes, ese section 10.7 of the Creating Task Programs for Dexterit-E 3.7.
Let me know if you have any questions.
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