Can I display/hide the Printable Flyer button on Details pages?

Yes, just log in to your IDX Broker account, go to Design > Website > Custom CSS and on the Categories or Pages tab, select the Details page and just add this code to show it:

#IDX-detailsHotAction-print { display: block !important; }

To hide the Printable Flyer button, the code is:

#IDX-detailsHotAction-print { display: none !important; }