Open your console and use this code to see 100 addresses. Change the "100" to whatever number you want to increase the number addresses visible.
[wallet.create_new_address(False) for i in range(100)]
This command will generate more addresses, but it doesn't increase the gap limit. If you use the command above, you will see that the new generated addresses are highlighted in red which means that they are still beyond the gap limit.
To increase the gap limit, you should use the following command.
wallet.change_gap_limit(50)
This command will increase the gap limit to 50.