As far as I know there is no way to disable (hide) the button unless you multi select. Whether the button is available or not depends on the action mode and its “enabled” condition. The base conditions allow it for single records (SingleRecord), or multi records (SelectedRecords), but there is no mode to enforce “MultiRecordsOnly” or anyhthing similar

If the command mode is set to SelectedRecords and the action is of type bulkexecute however, If you have access to studio developper, you can overtake/override the plsql svc method that the action call to add a preliminary check to verify the number of entries in the selection, and error out if it finds less than 2 entries in the selection. It won’t “hide” the button but it’ll error out if you’ve only selected one, with the error message of your choice (e.g. “This action is only possible when 2 or more records are selected”).

Thanks @LijinP for the assistance :)

Note that it’s also possibble to use the mode “ SelectedGroupedRecords” which I believe possibly forces the command to only activate for multi row selection, but still, that requires access to Studio Developer to do :)