You can now add how many calories an item/modifier contains.
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Simply go to Menu > Edit Menu > Edit (Item) > Tags & Allergens > Click on Nutrition drop down button

Here, you can add different nutrition values for each item. You can also add the calorie count for each modifier which will be added to the total calorie count.
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To add a calorie count to a modifier, simply go to Menu > Edit Menu > Edit (Item) > Modifiers > Edit > Click on Pen Icon > Tags & Allergens > Click on Nutrition drop down button.
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