Algodoo

You can stabilize the displayed values by reducing the number of digits of precision like this example: text = {
"B: " + math.tofloat(math.toint((Scene.my.x2 - Scene.my.x1) * 10000)) / 10000
}

Of course you would need to change the variables shown here for each of the three display boxes.

Question: Why did you need to set the sim frequency = 1000? It seems to work Okay for me at 60.

Xray,

Thanks. I used your suggestion.

I set sim.frequency = 1000 for smoother operation and to prevent the ruler from vibrating off the pencils after the pencils have moved.

Looks good and works very well. I wanted to rate this scene, but ratings are not currently working due to the new website changes. Maybe later (don't worry..... I'll give it a solid 10 )