Is it possible to "export" a tempo report to pdf?

There is no way to export a tempo report. For printing purposes, you will have to print the entire page. In Chrome, if you print the report by right clicking, you can save it as a pdf as well.

You can find the link which explains this:

support.google.com/.../1379552

And if using IE, make sure to follow the steps here:
forum.appian.com/.../Configuring_Printing_in_Internet_Explorer.html

If interested, you can export it to Excel using the "Export SQL and Report Data to EXCEL - V2" plug-in to which a new function was recently added "Export Report Servlet" forum.appian.com/.../summary

Although that function, according to the author, works for Tempo reports that rely on getportalreportdatasubset().