This conversation has been merged. Please reference the main conversation: Lightroom 6: Applying Develop Presets in the Library Module is not possible.
You used to be able select multiple thumbnail images in the Grid mode and apple Preset(s) simply by right clicking. Now, this menu options has been removed and all you can do is convert to Black & White or Auto White Balance!
Where has this feature gone? Please bring it back. Very frustrating!