Assuming you're on a SID, are you cleared above 6000', or is that your stop altitude. If so just put above 4000' at the selected point. The difficulty is if you're cleared to say 9000', but can't climb above 6000' till past this waypoint.
Putting a pbd (place bearing distance) just after this waypoint, and constraining this to below 6000' would be a less than ideal fudge. Is there a more elegant way?
