* The format of text in a chart legend will have the same
rows as the cell that is the header for a series of data.
You may find this useful to re-shape the legend to be more
readable. You will probably find that short rows work
best.
* You can go one step further. Build the header as a
string of discritive data elements from other cells and
concatinate CHAR(10) to break into rows.
* The only downside I have encountered is when you need
to later cut/paste in the future.