Eclipse window keeps widening

When I am editing an xpage, and click on the Events tab for that page, each time I select an event (eg data-querysavedocument) the window gets wider. I can’t seem to find out how to make the window narrow since there’s nothing but white space in it anyway. To the right of the action list there are the ‘server options’. If you don’t know they are there, you will never find them. You MUST use the scroll bar to see the ‘server options’. The events view does not seems to have a menu like the Properties or Problems tabs.