You can completely customize the layout of meals in your week and have up to 9 meals per day. As an ETM Premium user, you can have different meals and nutrition targets on each day of the week (allowing you to do things like have different nutrition targets on workout and rest days or create more complex leftovers patterns).

On the website:

To edit your Meal Layout, click the three-dot menu button near the upper right of the planner page, and select the "Edit Meal Layout" option. You can also access this by expanding the main menu in the upper left and going to Meals & Schedule > Meal Settings.

Here, you can use the "Create Meal Setting" option to add any new meals as needed, and you can customize the way these meals are set up in the Meal Layout section below. You can leave every day the same, or toggle the option to have a different layout for each day of the week (if you have ETM Premium). You'll see the Nutrition Target listed for each day of the week, which you can select to swap out with any other sets of targets you've created or add a new set of targets. 

Here's an example of a layout that is customized with varying meals and targets for each day:

Once you make the changes you want, regenerating your week will update the meals in your planner to reflect these changes (or once it is auto-generated your following week).

On the app:

To edit your Meal Layout, click the three-dot menu button near the upper right of the planner page, and select the "Edit Meal Layout" option. You can also access this by going into the preferences menu in the lower right and going to Meal Layout.