It's probably Data-Validation. It has a tab called "Input Message" that
will act as you describe. This is normally used to describe to the user what
must go in a cell, but it can also be used a general comment.

"JB Christy" wrote:

I'm familiar with the comments that appear when your mouse hovers over a
cell. However, I noticed that in some of the templates that I downloaded
from Microsoft's site they had comments that appeared when the cell was
selected. So the comment always appeared when you tried to enter data in the
cell, regardless of how you selected the cell (arrow keys, tabbing, as well
as hover/mouse click).

Does anyone know how they did that? I can only do the "Insert Comment"
thing, and the comment only appears if they happen to move the mouse over
the cell.

a T d H v A a N n K c S e.

-JB