The App Designer in detail > The App Designer window
Editing files
Double-clicking on a python or ui file will open the file inside the apps IDE.
Double-clicking on an image or data file will open the file outside the apps IDE, using the application associated to that type of file in the operating system.
It's also possible to open a python or a ui file in an application outside the apps IDE, using the Open with external editor option from the file context menu:
Source: https://docs.sw.siemens.com/en-US/doc/254352342/PL20250521841123434.amesim_collection.App_Designer/xid1018173 · retrieved 2026-07-17