The 'Load selections from file' button appears when a report is loaded in EQuIS Professional.
Click on it to load saved selections of the parameters of a report from either "Input Parameters (*.xml)" or "Input Parameters in Excel (*.xlsx, *.xls)" as shown below.
Note that if the xml or xls/xlsx file is created for a report that is different from the current report, loading it will assign the selections of matched parameters and ignore other parameters.