1. Click on the page button i the lower left corner
2. Double click on a page to rename it
3. Click on the plot file in the workspace (the “Pages in this plot” overview is now hidden)
4. One again click on the page button
The page name is not saved but still in edit mode. It is save if you press ENTER or TAB or if you click somewhere else inside the “Pages in this plot file” overview, BUT I would also expect it to be saved, when I click on the plot file outside the “Pages in this plot file” overview.