Hello all, It would not be difficult to add: "To delete an activity, press the 'Stop Activity' button then click the red 'X' and confirm the deletion" to the "Activities" page in the "Using Plasma" section of the "KDE Help Center". It is not quite intuitive and I had created quite a large collection.
Thanks for considering this and keep up the rest of the good work you have been doing. Bill Calkins
