How do you wrap the title text of a sheet in Numbers? Wrapping the text of a cell can be done by control clicking and selecting the Wrap Text menu item so that it is checked (or by using the formatting side-bar.  However, there is no obviousuly intuitive method of wrapping the text in the zero or title cell of a sheet.

If I have a really long title text, how do I shorten the line length but keep all the title text?
By going into cursor edit mode (eg, clicking into the title cell's text editing area), and then by typing the combination of 'Shift-Enter', you can insert a line break to shorten the line lengths of the title cell.