To start training of Image Classification model all you need to do is to press start training button in the top left corner of Image Classification projects window.
Test Model Training Results
Right after your model have trained you can test your Image Classification model right in the MakeML app. You just need to press "Run model" button from training list view controller.
When the model will be downloaded from the server you'll see the following screen. You need to drag&drop images to the left pane, or press "Import images" button, to import test images.
After importing images you will see a list of images in the left pane, you also can see training parameters at the bottom. In the right pane you can see a list of classification labels and confidence for each of them.