My old Keywords have no exportation option, I want change all my Keyword in one clic.
Multi selection works but when I want change option, only one appear in the box.
Thanks for your help
If you are referring to multiple keywords at once then it is not possible in LR as it is not a feature of LR, so would suggest you to fill in the feature request form
As Rohit observed, you can't edit multiple keywords at once. This is particularly inconvenient when you want to change the attributes controlling export and whether a keyword represents a person. Many, many people have requested improved facilities for managing keywords -- please add your vote and opinion to this topic in the official Adobe feedback forum: Lightroom: Better keyword management. That will, in a small way, make it more likely that Adobe might improve keyword management.