You can add lines between columns in Tableau using the "Show Column Grand Totals" option. This feature adds a line at the bottom of each column, effectively separating them visually.
Here's how to do it:
- Right-click on the "Rows" shelf.
- Select "Show Column Grand Totals".
This will add a line at the bottom of each column in your view, making it easier to distinguish between them.
Note: This method only adds lines at the bottom of the columns, not between them.