:orphan: ############################### Level 15: Customize the trainer ############################### In this level you'll learn to modify the behavior of the Trainer. ---- .. raw:: html
.. Add callout items below this line .. displayitem:: :header: Create and use Callbacks :description: Modify Trainer behavior with reusable, self-contained code. :col_css: col-md-6 :button_link: ../extensions/callbacks.html :height: 150 :tag: advanced .. displayitem:: :header: Customize the progress bar :description: Create beautiful custom progress bars. :col_css: col-md-6 :button_link: ../common/progress_bar.html :height: 150 :tag: advanced .. raw:: html