At some point all developers have the requirement to be able to locate a particular piece of AX object or code. AX does provide some out-of-the-box tools that you could use in order to find Application Object Tree (AOT) entries. Here are the tools and techniques available on how to find AOT objects in AX.
1. The Developer tools
In the AX Developer client under the menu Tools > Model management > Model elements you get a Form-based representation of the top-level Application Object Tree entries, which you could filter by a specific layer, model, type or element name. It is displaying the element from a system view called SysModelElement.