Alpha Over in editing question

how do I expand the length of an Alpha Over strip? It is the second Alpha Over in the stack and it is too short to cover the image sequence below it. In the Edit Strip panel off to the right, the Length control is grayed out.

A screen shot or more details are required. The alpha over strip is an effect strip spawned by the original strip it is attached too. If you make that one longer the effect strip will also get longer. IF you can’t stretch the image sequence try adding a speed effect first? Or why not just change the blend type of the source strip (image seq) to alpha over in it’s Strip properties.

Never mind. Figured it out.