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Grackle Slides can help identify accessibility problems in a Google Slides presentation, but accessibility starts before you run the checker.

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A presentation should work as a presentation concise, visually organized, and designed to support communication.

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If your audience needs extended prose, detailed instructions, or reference material,

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consider whether that content belongs in speaker notes or in a document instead.

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To begin, open grackle slides from the extensions menu.

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Grackle analyzes the presentation and groups the results into accessibility checks that have passed, need review or require correction.

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You don't need to memorize every category. Instead, use the results as a guided review of the deck.

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In this example, grackle has identified several common problems.

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Some slides have title or structure issues.

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Meaningful slide titles help users understand where they are in a presentation and provide useful structure for assistive technology.

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Other elements need alternative text. Images that communicate information should have concise descriptions that convey their purpose or meaning,

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not simply repeat what is already visible elsewhere on the slide.

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Grackle may also flag formatting or color concerns.

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These deserve human review. An automated checker can identify potential problems,

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but it cannot always determine whether a visual choice works for the people using the presentation.

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It is much easier to create accessible slides than to repair inaccessible ones later.

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Keep text concise and use a clear visual hierarchy. Give slides meaningful titles, use readable type and sufficient contrast,

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and don't rely on color alone to communicate meaning and avoid turning slides into miniature documents.

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If you need a detailed explanation, speaking script, or additional context.

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Speaker notes can often hold that information without overcrowding the slide.

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If the material is fundamentally meant to be read rather than presented, the more accessible choice may be to create a document instead.

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One check deserves particular attention.

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Reading order sighted viewers can scan a slide and infer relationships from position, size, spacing, and visual design.

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A screen reader encounters the individual elements in a sequence.

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That sequence does not necessarily match what the slide looks like.

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Here, I'm reviewing the order of the objects on each slide and adjusting them so the content is encountered logically.

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Usually that means beginning with the slide title followed by the primary content and then supporting information,

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but the correct order depends on what the slide is trying to communicate.

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This is why reading order requires judgment rather than simply clearing an error message.

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As you review each slide, ask if I couldn't see this slide, Would this sequence still make sense?

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A slide can look perfectly organized while its underlying reading order is confusing.

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So this is one area where I recommend slowing down and checking deliberately, rather than assuming the visual layout tells the whole story.

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After making corrections, run grackle again to verify that the issues have been resolved and review anything that still requires judgment.

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The basic workflow is simple design intentionally check with grackle.

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Review with human judgment recheck. Two things are especially worth remembering.

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First, pay attention to reading order. Visual placement does not automatically create a meaningful sequence for someone using assistive technology.

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Second, accessibility remediation cannot compensate for choosing the wrong format.

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Slides should function as slides. Documents should function as documents.

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Grackle is a useful check, but accessible communication is still a design decision.