How to create user's icons and use them in list?

I am using the list as a multi-level menu, the example of “lv_ex_list_1.c” is very cool, especially of the icons. I want to know create user’s icon and use them, Maybe it is very easy, I really don’t know how.
Thank you very much!


The documentation explains how to add new symbols. Here is the link for v7 and here is the link for v6.

Is that what you’re looking for?