SSRS Dashboard Scaling

I've created some reports (SSRS) to be used with the Select a Report Widget in Dashboards.  When I view them (in Dashboards in Tessitura), they look great.  However, I shared them with a colleague and when she opened them, they were too large and you had to scroll horizontally to see everything because of her screen resolution settings.

Does anyone know if there's any way to have SSRS reports automatically zoom based on the size of the window?  I tried adding rc:Zoom settings to the URL, but that doesn't work with the Toolbar setting as false (and it definitely needs to be false here, as the setup of this particular dashboard relies upon one widget being maximized, so the toolbar takes up nearly half of the non-maximized dashboards.)  Also, the zoom doesn't automatically refresh when you maximize the one widget, so you would need the respective toolbars in order to refresh the widgets (and again, this is not an option given the size).  Any ideas?