I'm happy you shared that image. I have the Interrupt Frequency at 10 usec, not 10 msec. I suppose that could have just been a default value.

I'm using the timer to count Ticks between encoder pulses. I control when the Elapsed Timer starts and stops, so do I really want such a fast interrupt that probably will take resources from other operations?

I'm assuming that the Interrupt Frequency triggers code in the background.