How to auto-size cell to display all text.

I'm not sure how to word this, but is there a way to configure the cells in Numbers 3.5.2 to expand to accommodate all text in the cell?

I've created a basic table that I'm using to log dates and hours for an internship. The date column has a simple SUM formula at the bottom. For each row of dates, I am entering notes about that day's activities. However, once the text reaches the bottom of the cell, it is obscured by the cell directly underneath. I seam to recall that early on, the cells autosized to display the text. I'm not sure if I've accidentally changed something.