How can I transfer the editing from a picture to other images. I don't find a synchronization option.
[Moved to Lightroom ecosystem forum by moderator]
Which Lightroom application are you referring to?
Lightroom Classic v 11.5 logo LrC or
Lightroom (cloud-based) v 5.5 logo Lr.
i use Lightroom classic version 5.5
If you have Version 5.5 you are running Lightroom (cloud-based) not Lightroom Classic.
Lightroom 5.5 means you are in the wrong forum. You have posted in the Lightroom Classic forum, but you do not use Lightroom Classic. Better to post in the Lightroom (Ecosystem) forum.
As you are using Lightroom 5.5, you can copy all the edit settings from a specific image (or you can choose which edit settings to copy), then you can paste those copied settings to one or many selected images.
Select the image you want to copy settings from, then click on the tri-dot icon underneath the edit tools on right-side of the edit panel. There you will see the available options (and the respective keyboard shortcuts). i.e.:
Cmd+C to copy all edit settings
Shift+Cmd+C to select which edit settings to copy
Cmd+V to paste the copied edit settings to a single image
Shift+Cmd+V to paste the copied settings to multiple selected images.