The easiest method is called Sync Settings. And it happens in the Library Module Grid View. LR employs the concept of Selected and Most Selected images. This is evidenced by slightly different shades of gray on all but the Most Selected image when a group of images are selected in the Grid View.
The Develop settings of the Most Selected image are applied to the rest of the selected images. In the right pane, there is a button {Sync Settings} After having Selected a group of images in Grid, clicking on this button will allow you to shoose which adjustments from the Most Selected image will be applied to the remaining Selected images.
Sorry, but I don't know exactly what to do. Select some RAW files in library grid-view (5-10 are enough?) and then press sync in the develop mode? That only syncs the settings to the selected RAW files before. I don't want to select hundreds of RAW files manually... I hope this is possible and I just missed something.
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