Prerequisite

This tutorial assumes you’ve completed the Making Mods tutorial series and have installed the required software.

The Sims 4 UI system is written in Adobe Flash using a file format called GFX. It supports rendering shapes, images, text, animation, scripting, and more. Additionally, GFX files can references some outside resources such as DDS images.

This leaves us with two obvious ways to edit the UI:

• Edit the UI Images - Easy to do, but limited.
  • Override icons, menu backgrounds, and map images.
• Edit the GFX Files - More difficult, but also more powerful.
  • Move, resize, animate, create, and delete UI elements

Let’s get started!