The parameter show_multihotel_selector or data-hotelrsv-multihotel-selector allows the hotel selector to be shown automatically, if certain parameters are specified.
For buttons (HTML) within your Web site, just add the parameter data-hotelrsv-show-multihotel-selector="1".
For URL (Links from outside your Web site), just add the parameter &show_multihotel_selector=1
We remind you that the following tools are at your disposal: