Text File Grid Editor
Grid Editor allows you to make direct edits to text files in an easy-to-use grid format right within Atlas.
Press the grid icon in the upper right hand corner of your text file to access this feature.
Add rows or columns by using the "+" and using the up and down arrow keys to adjust the placement.
To keep an area of a worksheet visible while you scroll to another area of the worksheet, Atlas' grid editor also allows you to freeze panes. The first option allows you adjust the amount of rows to freeze while the second is to freeze columns.