It seems like you are in the "Print Layout View". To exit, click on the icon in the toolbar that looks like an eye, next click on the icon that looks like a printer. This should bring you back in the normal view. Let us know if you run into any other issues.
This is how to fix this, if anyone encouters the same problem:
- Select the entire table by clicking on the corner (top-left of table where the rows and columns connect)
- Click and drag one of the separators to expand the size of the cells to a suitable size for display
That solution makes sense. The response view allows you to resize columns, and if you select multiple columns and resize, the resize applies to all of them. I suspect you accidentally resized all of your columns too small :-)