Merge Points allows you to consolidate two points into one.
Select the point you want to keep. We will refer to this as the Blue Point below.
The selected point will turn blue. Now select the point that will be merged into the selected point. We will refer to this as the Red Point below.
You have three options as to where the points will merge.
You can merge the points at the location of the Blue point, at the location of the Red point or at the center of the Blue and Red points.
If you choose At Center, the keep point and merge point will be moved to the center between the points and merged.
The image below shows the results of the Merge at Center option.