Group: Pic-in-Pic - Welcome to the group...

Go to the photo you want to add as a pic-in-pic,
from the drop-down menu "Actions" choose "Share",
choose the desired size, click html code and copy the whole code

Now go to the photo you want to insert the photo in,
from the "Actions" menu choose "Add a note",
insert the copied html code into the box where it says "type a note", save.
You can move or change the shape of the frame above the box, where your photo now should appear.

Thank you