Click 'Read'. A downsampled version of the drawing appears in the middle square.
The network now tries to guess what you have drawn and displays the character in the right right square.
Training instructions:
The preloaded network only knows about the characters A, B and C. You can improve the recognition of these characters, or add new characters to your liking.
Type the character to train in the input field.
Draw the character in the left square.
Click 'Train character'.
Repeat this with different drawings of the same character to train the network.