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How to add alt text on Twitter


If the feature already existed, it was impossible to know which photos had a description. The place to write an alternative text was also difficult to locate.

Starting today, images containing text are clearly marked with the word ALT, inscribed in the lower left corner of these. When you hover over this mention, you see the description of the image written by the person who published it.

This feature is essential for people who use screen readers or text-to-speech programs due to visual impairment.

Social media accessibility expert Alexa Heinrich says the feature is a step in the right direction because it makes the presence of alt text more obvious, prompting people to learn more about accessibility.

First, it highlights who is writing alt text and who is not. Second, this feature is a great learning tool for anyone who wants to get better at writing alt text, because now you can easily see what others are writing.she wrote on Twitter.

How to use alt text

Here’s how to add a description to an image on Twitter.

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After importing a photo on the social network, click on the button Add Description on the right, under the photo. Then we select okay and a field appears under the photo to write the text.

Each image description has a 1000 character limit, and anyone can access it, not just visually impaired or blind people.

Tips for writing

Writing these image descriptions should be clear and concise, while giving the tweets more context.

It’s important to capture action, movement, relationships, news items, visual details, and anything unique in the image.

People, pets, objects, their names and their interrelationships are indicated. We mention the type of photo in question, either a close-up, an aerial view or in black and white. If the image is a screenshot, it is underlined.

It is important that the text be succinct. If the latter is limited to 1000 characters, be aware that some assistive technologies stop reading descriptions after 200 to 250 characters.

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Unless it’s a photo you’ve taken, it’s best to stay objective and stick to a simple description of the image.

In its guide, Twitter gives the example of an image that represents a public figure that we do not like. Don’t refer to his silly little face. Say instead that he smiles, lips closed in front of the camera.

If the image contains text, we include it in the description. If it’s a legal document, for example, summarize the content and provide a link to the source in your tweet, not in the image descriptionexplains Twitter.

It is also preferable not to repeat in the description of the image what is already written in the associated tweet and to add a clickable link to give more information, especially if the subject is complex.

Acronyms must be capitalized, otherwise some screen readers may read them as words. For abbreviations, it is better to avoid them and write the words in full. For example, instead of writing Drwe will write doctor.

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