Garmin G1000 NXi Issues and Support

I apologize if this has been asked before or if this is a newbie question. Is there any way to set an alert when I arrive at x distance to my destination?

I’m still very new to all this (really) and have been calculating my TOD manually, and changing my altitude/vs to follow a proper glide slope during descent.

I’d like to have some audible or on screen warning when I reach a point on my course. Not sure about my methods here but I’ll learn better ways in due time. LOL

Any guidance would be appreciated.