I have a sketch with a single line in it.  I closed the sketch and I now want to add a point on that line which is 1mm from the end point of the line.

The options for Distance and Pecentage are greyed out so I can not select them and the Evenly Distribute option is checked.  I can change the number of points along the line and that's it.  I have no other options for adding a point on that line.  What's wrong here?

I have attached the part and i'm trying to add a point on the line in Sketch6.