If you have already created a plan and want to edit it, open it by clicking it in the calendar. Then click on the icon to edit and the card opens and you can do the changes you want.
When you are done with your editing you click on Save, or Cancel if the editing was not needed. When you are in editing mode, it is not possible to do anything else in Newsroom Planner before you close the editing.
Click on Cancel or Save when you are done with your editing