During training, tensorboard summaries are saved to summaries/run-id/timestamp_worker-id if not modified by the --out=<path> flag.
Run tensorboad --logdir=summaries --samples_per_plugin=text=100 to watch the training and evaluation statistics in your browser using the URL http://localhost:6006/.
The --samples_per_plugin=text=100 flag assures that all items of the training configuration (e.g. hyperparameters) are visible inside the Text tab of Tensorboard.
The minimum and maximum of final episode information is added to the summary and can be controlled in each environment's wrapper. For example see Obstacle Tower: obstacle_tower_wrapper.py#L197