In facebook the ____ info simply tells you the last time a person logged on.

The Messenger Platform allows you to attach assets to messages, including audio, video, images, and files. The maximum attachment size is 25 MB. The maximum resolution for images is 85 Megapixel. There are three ways to attach an asset to a message:

Please note that our servers might encode an uploaded file to ensure compatibility. It's possible to get a file size limit error if the resulting size surpasses the 25MB limit.

Attachment Types

The Messenger Platform supports the following attachment types, specified in the attachment.type property of the message:

• audio
• video
• image
• file
• template. For more info on this type, see Templates

Attaching from URL

To send an attachment from a URL, submit a POST request to the Send API, with message.attachment set in the request body. The attachment object includes the asset type (image, audio, video, or file), and a payload that includes the asset url:

curl -X POST -H "Content-Type: application/json" -d '{
  "recipient":{
    "id":"1254459154682919"
  },
  "message":{
    "attachment":{
      "type":"image", 
      "payload":{
        "url":"http://www.messenger-rocks.com/image.jpg", 
        "is_reusable":true
      }
    }
  }
}' "https://graph.facebook.com/v15.0/me/messages?access_token="
  

Attaching from File

To send an attachment from file, submit a POST request to the Send API with the message details as form data, with the following fields:

• recipient: A JSON object identifying the message recipient.
• message: A JSON object describing the message. Includes the asset type, and a payload. The payload is either empty, or sets the property.
• filedata:The location of the asset on your file system and MIME type.

curl  \
  -F 'recipient={"id":""}' \
  -F 'message={"attachment":{"type":"", "payload":{"is_reusable":true}}}' \
  -F 'filedata=@/tmp/shirt.png;type=image/png' \
  "https://graph.facebook.com/v15.0/me/messages?access_token="  
  

Attaching Saved Assets

The Messenger Platform supports saving assets via the Send API and Attachment Upload API. This allows you reuse assets, rather than uploading them every time they are needed. For information on saving assets, see Saving Assets.

To attach a saved asset to a message, specify the

curl  \
  -F 'recipient={"id":""}' \
  -F 'message={"attachment":{"type":"", "payload":{"is_reusable":true}}}' \
  -F 'filedata=@/tmp/shirt.png;type=image/png' \
  "https://graph.facebook.com/v15.0/me/messages?access_token="  
  

curl  \
  -F 'recipient={"id":""}' \
  -F 'message={"attachment":{"type":"", "payload":{"is_reusable":true}}}' \
  -F 'filedata=@/tmp/shirt.png;type=image/png' \
  "https://graph.facebook.com/v15.0/me/messages?access_token="  
  

Only attachments that were uploaded with the

curl  \
  -F 'recipient={"id":""}' \
  -F 'message={"attachment":{"type":"", "payload":{"is_reusable":true}}}' \
  -F 'filedata=@/tmp/shirt.png;type=image/png' \
  "https://graph.facebook.com/v15.0/me/messages?access_token="  
  

curl  \
  -F 'recipient={"id":""}' \
  -F 'message={"attachment":{"type":"", "payload":{"is_reusable":true}}}' \
  -F 'filedata=@/tmp/shirt.png;type=image/png' \
  "https://graph.facebook.com/v15.0/me/messages?access_token="  
  

User experience (UX) design is the process design teams use to create products that provide meaningful and relevant experiences to users. UX design involves the design of the entire process of acquiring and integrating the product, including aspects of branding, design, usability and function.

Designing an experience includes not only making the software easy to use but also designing the other experiences related to the product, for example, the marketing campaign, the packaging and after-sales support. Most importantly, UX design is concerned with delivering solutions that address pain points and needs. After all, no one will use a product that serves no purpose.

What UX Designers Do Goes Beyond UI Design

“User Experience Design” is often used interchangeably with terms such as “User Interface Design” and “Usability.” However, while usability and user interface (UI) design are important aspects of UX design, they are subsets of it.

A UX designer is concerned with the entire process of acquiring and integrating a product, including aspects of branding, design, usability and function. It’s a story that begins before the device is even in the user’s hands.

“No product is an island. A product is more than the product. It is a cohesive, integrated set of experiences. Think through all of the stages of a product or service – from initial intentions through final reflections, from the first usage to help, service, and maintenance. Make them all work together seamlessly.”

— Don Norman, inventor of the term “User Experience.”

Products that provide a great user experience (e.g., the iPhone) are thus designed with the product’s consumption or use in mind and the entire process of acquiring, owning and even troubleshooting it. Similarly, UX designers don’t just focus on creating usable products; they concentrate on other aspects of the user experience, such as pleasure, efficiency and fun. Consequently, there is no single definition of a good user experience. Instead, a good user experience meets a particular user’s needs in the specific context where they use the product.

A UX designer attempts to answer the question: "How can we make the experience of interacting with a computer, a smartphone, a product, or a service as intuitive, smooth and pleasant as possible?"

UX Design—A Formal Definition

The International Organization for Standardization (ISO) defines user experience as:

“A person's perceptions and responses that result from the use or anticipated use of a product, system or service.”

— ISO 9241-210, Ergonomics of human-system interaction—Part 210: Human-centered design for interactive systems

We can break this definition into two parts:

1. A person’s perceptions and responses.

2. The use of a product, system or service.

In user experience, designers do not have much control over a person’s perceptions and responses—the first part of the definition. For example, they cannot control how someone feels, moves their fingers or controls their eyes as they use a product. However, designers can control how the product, system or service behaves and looks—the second part of the definition.

“One cannot design a user experience, only design for a user experience. In particular, one cannot design a sensual experience, but only create the design features that can evoke it.”

— Jeff Johnson, Assistant Professor in the Computer Science Department of the University of San Francisco

The simplest way to think about user experience design is as a verb and a noun. A UX designer designs (verb)—ideates, plans, changes—the things that affect the user experience (noun)—perceptions and responses to a system or service.

The simplest way to think about user experience design is as a verb and a noun.

For example, when using a physical device, such as a computer mouse, we can control some aspects of the product that influence whether the user enjoys looking at, feeling and holding it:

• The way it fits in their hand. Is it snug? Is it too big and cumbersome?

• The weight. Does it affect their ability to move it as they wish?

• Its ease of use. Can they use it automatically, or do they have to think hard about it to achieve a goal? 

When a person uses a digital product, such as a computer application, a few aspects that we can influence include:

• How intuitively they can navigate through the system.

• The cues that help guide them to their goal.

• The visibility of the essential aspects of a task at the appropriate time.

UX Designers Consider the Why, What, and How of Product Use

As a UX designer, you should consider the Why, What and How of product use. The Why involves the users’ motivations for adopting a product, whether they relate to a task they wish to perform with it or to values and views that users associate with the ownership and use of the product. The What addresses the things people can do with a product—its functionality. Finally, the How relates to the design of functionality in an accessible and aesthetically pleasant way.

UX designers start with the Why before determining the What and then, finally, the How to create products that users can form meaningful experiences with. In software designs, you must ensure the product’s “substance” comes through an existing device and offers a seamless, fluid experience.

UX Design is User-Centered

Since UX design encompasses the entire user journey, it’s a multidisciplinary field–UX designers come from various backgrounds such as visual design, programming, psychology and interaction design. To design for human users also means working with a heightened scope regarding accessibility and accommodating many potential users’ physical limitations, such as reading small text.

A UX designer’s typical tasks vary but often include user research, creating personas, designing wireframes and interactive prototypes, and testing designs. These tasks can vary significantly from one organization to the next. Still, they always demand designers to be the users’ advocates and keep their needs at the center of all design and development efforts. That’s also why most UX designers work in some form of user-centered work process and keep channeling their best-informed efforts until they address all of the relevant issues and user needs optimally.

User-centered design is an iterative process where you take an understanding of the users and their context as a starting point for all design and development.

Learn More about UX Design

You can read and watch more about UX design from the inventor of the term, Don Norman, on the Nielsen Norman Group website.

Learn about UX design by reading the insightful, funny and inspiring material about UX on Medium.com.

If you want to start learning how to work in UX Design now, the Interaction Design Foundation’s online courses are a great place to begin.

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