Sure, here are ten useful features that can help distinguish an airplane cabin in a photo:

1. Seats: The type, color, and arrangement of seats can be a significant indicator of the airplane cabin. Different airlines have their unique seat designs and colors, so paying attention to these details can help identify the cabin.

2. Cabin Class: The cabin class can be determined by the type of seats, legroom, and overall space available in the cabin. For example, first-class cabins are typically more spacious and luxurious compared to economy class cabins.

3. Lighting: The lighting in the cabin can also be a useful feature. First-class cabins usually have more subdued lighting, while economy class cabins have brighter lighting.

4. In-Flight Entertainment: The type of in-flight entertainment system can also be an indicator of the type of cabin. For example, first-class cabins often have larger and more advanced entertainment systems compared to economy class cabins.

5. Cabin Decor: The decor of the cabin can also be a useful feature. For example, some airlines have a specific color scheme or design theme for their cabins.

6. Aisle Width: The width of the aisle can also be an indicator of the type of cabin. First-class cabins typically have wider aisles compared to economy class cabins.

7. Storage Space: The amount of storage space available in the cabin can also be a useful feature. First-class cabins often have more storage space for passengers compared to economy class cabins.

8. Food and Drinks: The type and quality of food and drinks served in the cabin can also be a useful feature. First-class cabins often have more gourmet food and premium drink options compared to economy class cabins.

9. Seat Pitch: The distance between the rows of seats, known as seat pitch, can also be an indicator of the type of cabin. First-class cabins usually have more legroom and a greater seat pitch compared to economy class cabins.

10. Window Shape and Placement: The shape and placement of windows in the cabin can also be a useful feature. For example, some airplanes have larger or more rounded windows in first-class cabins compared to economy class cabins.