Rotate image in Stacks

When I drag a portrait image into stacks it becomes landscape, Can’t find out how to rotate.

Thanks for your help. RW and Stacks is up to date.

You may need to go to that stack’s settings in the Inspector and make sure that settings for max-width and max-hight are not improperly set. Constraining those dimensions improperly may distort the size and shape of your photo. To get to those settings double-click on the image – after placing it inside your stack.

Tx Rob I also learned from your reply how to get to the setting by double clicking the image.