Hi, I would like to timestamp my document as follows
In one instance, I would like to insert a timestamp in M# whenever it moves
from all the cells in that row being blank to all but one of them being blank
(first instance of a record in this row). I would also like to remove the
timestamp if everything in the row besides M# again becomes blank.

In the 2nd instance, I would like to update N# whenever anything in the row
is updated, with a current timestamp. (ie, last edited date)

Any help?