Final answer:
To determine if French bread is done in the proofer, look for a light brown crust, a rigid texture, and proper rising.
Step-by-step explanation:
When determining if French bread is done in the proofer, you can look for certain signs. Firstly, the crust should turn a light brown color, indicating that it has been cooked. Additionally, the bread should no longer be flexible but rather more rigid. Lastly, you can check if the bread has risen enough, indicating that the yeast has properly fermented the dough. These signs together indicate that the French bread is done in the proofer.