Back to api : change layout

hi

i thank you for your answer and your patience but i see here :

Another interesting call in our test .json collection from this guide is:
Action: Change layout

You’ll need displayGroupId and layoutId
You can call GET Displays to get displayGroupId - each display has it’s own unique displayGroupId

it’s what i did i made the get displays api call to have the displaygroupid

because i didn’t create any displaygroup

in a post you talk about hidden displaygroupid i didn’t understand what you mean

i think i follow the guide in a right way but the layout don’t change

thanks for your patience