To display a player's head as a 2D or 3D image using an Image element, you can use a 3rd-party web API called "Minotar".
In the FancyMenu editor, right-click on the background, select "New Element," and then choose "Image" (or "Picture").
Right-click the Image element to access its properties. For the source type, select "Web."
In the "Source" field, you would enter the following URL:
https://minotar.net/avatar/{"placeholder":"playername"}.png
FancyMenu will use the {"placeholder":"playername"} to dynamically insert the current player's username into the URL, allowing the Image element to fetch and display their head from Minotar.
This one's pretty similar to the 2D version, but here we need to use a different URL:
https://minotar.net/cube/{"placeholder":"playername"}/200.png
The 200 is the pixel size in this case, so if you want a smaller version, just replace it with 100 for example, or for a bigger version, use 300 and so on.