Page History

...

1. In the Data Preview, click on the heading of the first column - it should say "General."
   (click image to enlarge)
   
   
   
   
2. Scroll the bar over to the far, right side so that the last column in your data set displays.
3. Hold down the Shift key on your keyboard and click the header of the last column.  Release the Shift key.  This should highlight all the columns.  (click image to enlarge)
   Image Removed
   
4. In Column data format, click the radio button next to Text.  This will import all of the columns in text format.
   (click image to enlarge)
   
   Image Added
   
   
5. Click Finish