couet
2
Welcome to the ROOT forum.
Search for the forum. This question has been asked 1000 times.
For instance:
Etc…
The forum is a great source of answers by itself ![:slight_smile: :slight_smile:](https://root-forum.cern.ch/images/emoji/twitter/slight_smile.png?v=12)
If you do not find an answer among the existing replis, do not hesitate to ask again.