Changement sur plusieurs photos en même temps

I'll help you figure out batch-editing images in Lightroom. What version of Lightroom & the operating system are you working on?

You've added a tag for 'Web.' If you're using Lightroom Web (https://lightroom.adobe.com), batch editing isn't yet possible on the web. If you use Lightroom desktop or Lightroom mobile, you can copy the edits you've applied on a photo and paste them across multiple photos. You can also choose which edit settings you want to copy from a photo.

Check this article & scroll down to 'Copy and paste edits': https://helpx.adobe.com/lightroom-cc/using/edit-photos.html

Let me know if this help. Thanks!
Sameer K