Garmin CSV files.:
I started looking at help articles about "squished Excel screens."
One comment helped a little.
I start with my CSV imported Excel file looking like this.
Click on any empty cell to ensure the sheet is selected.
On the keyboard do a (Ctrl) + A to select ALL the cells
All the cells will turn gray like indicating your next action will apply to all.
If you have additional sheets at the bottom of your Excel window like mine, click on them as well.
Grab the right side of B column thusly, and drag it right a couple columns width
to the right and release.
ALL the columns will open up like this
Click here to center the text in the columns
Experiment by grabbing the "A" column instead of "B" or "C" etc.
If I find better information, I'll pass it along.