AutoCAD Electrical defaults to icon menu ACE_<standard>_MENU.DAT (where <standard>= JIC, IEEE, IEC, IEC-60617, AS, GB, HYD, JIS, PID, or PNEU) for schematic symbols and ACE_PANEL_MENU.DAT for panel symbols. These menu files are found in:
You can create alternate or project-specific icon menus and have AutoCAD Electrical automatically use them instead of these defaults.
An icon menu can be tied to a project so that when the project is active, AutoCAD Electrical references that special icon menu instead of the AutoCAD Electrical normal menu. The full path of the alternate menu and file name is saved in the project's .wdp file. You can save an alternate menu for schematic symbols and one for panel symbols.
Assign specific icon menu files to a project

.
Project Settings dialog box, click the plus sign (+) next to Schematic Icon Menu File or Panel Icon Menu File. Click inside the edit box to change the path of the icon menu, click Browse to search for and select an icon menu, or click Default to use the default icon menu.If you make custom images or libraries for the menu, copy them to the same subdirectory as the menu file since AutoCAD Electrical looks for menu images in the directory of the active menu file.