Info line stays focussed until manual defocus or enter.

Yes, same on mine. I must just be misremembering it.

If you want to keep the focus in the editor and change the Start/End/Length, don’t click. Just hover the mouse over the value and use scroll-wheel to increase/decrease the value.

Yeah, I’m aware of that and I always used to use the scroll wheel for value inputs, but I switched to an Apple Magic Mouse and scrolling on a smooth surface is not as precise or as satisfying as scrolling with a standard clicky scroll wheel. I would switch back to my faithful Logitech but I’m now in the habit of scrolling sideways by rubbing my finger laterally across the mouse and it’s a real timesaver.

We’re definitely straying into the realms of First World Problems now.

Thanks for your input with this, even if all we’ve proven is that my mental acuity is not all I think it is.