By popular request, the new NorthstarMLS default setting for ShowingTime overlapping appointments is to continue to allow them, but no longer reveal the appointment blocks/overlaps to the showing agent that other agents have scheduled.
List agents may change this setting on some or all of their listings if they choose. The other options are to allow overlapping appointments and show the other appointments/overlaps, or to not allow overlapping appointments at all.
If you want to change this setting for any of your listings, here are the instructions.
For more detailed instructions on changing this and other ShowingTime settings for your listings, check out this ShowingTime help page.