Work area too small?

I’ve been working in flash for years, but for some reason have only come across this problem now…

I’m trying to set up a long row of images in a movie clip so as to be able to drag through them when loaded into my main movie.

However, even when I zoom out fully, I cannot make the workspace area large enough to drag the images into the right place.

I’ve attached an image to help explain my difficulties.

Has anyone got a way to make the workspace larger or think of a sensible workaround, so that I can space the images correctly?

Many Thanks,