How to show 'Reload & Test' section and reload button on module panel


I’m very new to 3D slicer and following this tutorial for learning python development.

I’m using 4.10.1 but I cannot find ‘Examples’ option in the module list (page 32) and not sure how to show Reload & Test section (page 40).
Could you tell me how to make them show up? and if there is other latest tutorials for python development, please let me know.


I think you need to enable Developer mode in the application settings (Edit menu / Application Settings).

It is also important to use the latest Slicer Preview Release and latest tutorial versions (, as we have improved many things and made many changes a year since Slicer-4.10.1.

Thank you so much. Referring the latest version of the tutorials and checking Developer mode solved this problem.