keep aspect ratio of picture popup

[CStüben]

Hi all,
when i want to make a picture to "popup", i can use either the picture hotspot, or i can use a polygon hotspot, proxy and a container with a picture, and set the container to visible / invisible.

A picture hotspot can be set to "fold up to 100%" and it keeps its aspect ration.

How can i set a container/picture to popup to 100% of the window height, AND to keep the aspect ration?

greetings from germany
Chris

[CStüben]

found it ... don´t may use a fixed picture, must go to the components and take a image popup.
This can be set to scale "min".