We have checked with Zendesk Product Experts and as per confirmation, you will only get a vertical line between the attributes (on rows) and the metrics as a whole, the vertical line is used only to separate attributes from metrics, but not from each other.
For us, this would be preferred for cosmetic purposes. As the reports exported are being presented to our customers' high level management, we would want to present the chart table in a fully lined table for below purposes:
- Makes representation of data easy.
- Makes it easy to analyse the data.
- Makes it easy to compare data.
- The data is represented in a readable manner which saves space and the reader's time.
Thank you.

