Waypoint

Format:

[group, index]

Description: Group is of type Group, index selects waypoint.
Index 0 selects first waypoint which is always created on group starting position.

Comments:

Note that [groupname, 0] is automatically created at a unit's starting position.

Therefore:

[groupname, 1] would be the first in-editor waypoint
[groupname, 2] would be the second
And so on...