I have an annoying problem with Excel 2007. When using its drawing features
to create arrows and straight lines it refuses to draw them horizontal or
vertical. They are always snap to a few degrees out. I have not switched on
any snap to grid options and holding down either the Alt, Shift or Control
key while rotating or editing the line has no effect. This happens even when
the lines are away from other objects. It was fine in Excel 2003.