I have to run a loop of a certain variable than spans through the entire notebook. However the notebook has already been divided into different sections; merging these sections will be a pain and break the structure of the notebook. What can I do? I looked at some answer: Do-Command around entire Notebook (by iterating it from another notebook?) but firstly I could not understand it, and secondly, for each loop I need to save hundreds of variable. The tags don't fit my question but unfortunately I do not have reputation to change, sorry about that. Thank you all!