I have a feeling I'm going to have a "Doh!..." just as soon as I hit "Post now", but as I haven't been able to find the answer for 4 days... here goes!

I know how to select an object that's under another object. But how do you select a point that's under another point?

For instance, if you've used the shape editor tool to insert a new point on a line, and you have broken the line at that point, and you want to move one of the points, which happens to be the lowermost one, how do you get at it without first moving the uppermost point out of the way?