To access the batch operations, open a folder or the library, long-press on any image you want to apply settings. Now, mark all other images you also want to apply the same settings. If done, choose "Batch Options" in the top menu.

Here are the individual functions explained which can be applied in batch:

• Apply: Apply the choosen rating or label to all selected files
• Remove: Remoe the choosen data from all the selected files
• Set GPS Location: Pick a location you want to geo-tag your images with
• XMP Keywords: Open the Keywords dialog to set all the Keywords you want to apply, as well as IPTC data
• Choose XMP-Template: Choose a XMP-Editing template to be applied (only relevant if you want to export/convert the files later)

Press "Apply" to begin the batch operation.