Hi..
Thanks for sharing the video.
The problem is you are not following the tutorial and are using an existing character instead of the the dummy template.
What you need to do is first prepare your images ready for character creation. This means having the full character as your reference image and then that same character broken down into all the individual parts (see the image below).
Then importantly, you need to first load one of the two front or side dummy templates (for example Human_Dummy_F) and then use the Sprite Editor to replace the Hip sprite with your own character reference image and position it as explained in the tutorial.
At this point you can now use "Layer Manager" to begin adding the parts and you will find that the Image Transform Settings > Keep Parent Transform option will work as described.
Peter
Forum Administrator
www.reallusion.com