I have Tecplot 360 EX 2016 R2, Version 18.104.22.168391. I would like to delete an unused frame but I cannot do it. According to the help I have selected the frame (with the arrow selector tool) and even activated the frame in the "frames sidebar". If then I press the Delete key nothing happens and, if I click on Edit on the bar, the Delete option is not available. Does anyone know how to do it?