The scrolling between pages in Print Preview is available only in the Windows Forms ReportViewer control and the feature was not included for the HTML5 Report Viewer.
We consider optimizing the experience on print preview in other viewers as well, and the feature is logged in our system. Depending on the required resources and the demand for it, it will be taken with the corresponding priority.
Your inquiry is counted as a vote for the feature.
If you want to include some navigation beside the HTML5 Report Viewer's toolbar options, you can use the commands
exposed as of Telerik Reporting Q2 2014 SP1 version 22.214.171.1244
I hope the information is helpful.
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