PDF Delivery of Dashboards- How to get the chart in the dashboard to fill the width of the page?

[notoriousNPC]

Scheduled a PDF Delivery of a custom dashboard, but I can't seem to get the chart in the dashboard to fill the width of the page.
I fiddled around with the Print button and that generates a PDF where the charts fill the width of the page but automating that might be a bit of a pain.

Any ideas?
Splunk version: 8.1.6

[cabauah]

did you figure out a solution w/o messing with the rendering