You can edit/create alert_actions.conf and make changes to the options under [email] stanza.
http://docs.splunk.com/Documentation/Splunk/6.4.2/Admin/Alertactionsconf
I have a similar requirement and I do not think there is any answer to this question. This means we cannot modify a PDF. I do not need visualization in my report, I need to change the title of the PDF report file from "Splunk search result" to "Last week statistics". Can this happen or not?
May be anyone can help on this. @niketnilay or @MuS or @mayurr98
Splunk 6.3 includes several improvements to PDF export around the ability to customize the output to match various branding and/or information guidelines. You will find them at Settings -> Server settings -> Email settings
No one can say as well that it's not possible?