Zwift training plan

Dear riders,

is there a possibility to stop (pause) a training plan. I have to pause 1 week and I’m right in the middle of a plan. I heard there is no chance but maybe there is a possibilty to change the date or something like that. I had a look but it does not work on my side.
Furthermore I would like to know if optional miles will count for the fulfillment (80%) of a training plan or not.