Dynamic alt text from a DAX measure keeps the card readable by screen readers

PL-300 By islever Editorial Last updated Sep 25, 2026

Enhance reports for usability and storytelling

Short answer

D Alt text driven by a DAX measure is both screen-reader readable and always current.

Question

You have a Power BI report that contains a card. The card displays the value for year-to-date revenue. You need to ensure that screen reader users can read the value when initially interacting with the card. The value must stay updated as the dataset is refreshed. What should you do?

Convert the card into a text box.
Add the value to the chart title text.
Populate the alt text with a static value.
Populate the alt text by using conditional formatting with a DAX measure. Correct Answer

Key Takeaways

Alt text is what screen readers announce for a visual, and populating it through conditional formatting with a DAX measure makes the announced string recompute with every data refresh.

A card showing year-to-date revenue must be readable by screen reader users at first interaction, and the spoken value must track dataset refreshes.

Common mistake: Hard-coding the value into alt text or the title — any static string goes stale the moment the dataset refreshes, failing the stay-updated requirement.

Expert Analysis

Why the Answer Is Correct

Screen readers read a visual's alt text when the user first focuses it, so alt text is the channel that must carry the card's value. Conditional formatting for alt text accepts a DAX measure, which recalculates as the dataset refreshes — the announced text always reflects the current year-to-date revenue. Option D delivers both the accessibility channel and the freshness requirement.

Why the Other Options Are Wrong

Converting the card to a text box (A) freezes the number into static report text that no longer updates from the model at all. Adding the value to the chart title (B) only helps if someone manually retypes it — titles are static strings, so they go stale. Static alt text (C) is readable by screen readers but contradicts the must-stay-updated requirement the moment new data lands.

Community Comment Notes

A commenter lays out the logic cleanly: screen readers read alt text, and because the value must stay updated the text must be dynamic — hence D over C. Another endorses the given answer for the same reason.

Official Reference

https://learn.microsoft.com/en-us/power-bi/create-reports/desktop-accessibility-creating-reports

This link opens the official vendor documentation in a new tab.

Community Votes

100%

100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 4 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 4

nelrosell 👍 4

Correct anwer but we need to move the date from row to colum bucket
jaume 👍 3 Answered D

Enabling screen reader to read anything, you must use the alt text. Since "value must stay updated as the dataset is refreshed", we cannot use a static value but a dynamic one so option D instead C
d216393 👍 1 Answered D

Alt text is the feature used for screen readers. As we want a solution that retrieves updated results, It has to be option D
Jayaruwan 👍 3 Answered D

Given answer is correct

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