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Responsive Testing: Managing Feedback Across Device Breakpoints

Review a site at desktop, tablet, and mobile widths — and leave feedback that records which one you were looking at.

Atarim team Updated 28 Jul 2026 · 6 min read
Visual Collaboration
The same page reviewed in Atarim at desktop, tablet and mobile widths
Before you start

Relevant for

  • Designers, developers, project managers, and clients reviewing work that has to hold up on phones as well as desktops.

Required knowledge

  • How to open a project in Collaborate and leave a comment.

Tools & resources needed

  • A project you can open in Collaborate, and a plan that includes responsive mode.

Most feedback is left at whatever width the reviewer’s browser happens to be. That is fine until a client says the navigation is broken and nobody can reproduce it, because they were on a phone and you were not.

Responsive testing fixes that in two ways: you can switch the view to tablet or mobile without leaving Atarim, and any feedback you leave records the width you were viewing at. Atarim frames it as leaving feedback across desktop, tablet, and mobile views so every breakpoint gets the attention it deserves — before it ships.

The three views

The device menu offers three fixed sizes. They are real dimensions rather than vague labels, which matters when you are checking a specific breakpoint.

ViewSizeRepresents
DesktopFull window widthHowever wide your own browser is. The default.
Tablet768 × 1024A standard tablet in portrait.
Mobile390 × 844A modern phone in portrait.
Responsive Mode — Desktop View
Responsive Mode — Tablet View
Responsive Mode — Mobile View
Note
There is no rotation control, so tablet and mobile are portrait only. To check a landscape layout, use your browser’s own developer tools alongside Atarim.

Key features

Four things make this more useful than simply resizing your browser window.

FeatureWhat it gives you
Switch view modesMove between desktop, tablet, and mobile inside Collaborate, without a second tool or a second browser window.
Comment in contextAll the normal feedback tools work at every width. Click an element at mobile size and the task pins to that element.
The breakpoint is recordedEach task stores the screen resolution it was created at, so a developer can tell which layout the feedback is about without asking.
One place for everyoneDesigners, developers, and clients all review in the same environment, so there is no separate round of mobile feedback to collate.

Switching between views

The device control sits in the Collaborate bottom bar, next to the other page tools.

  • Open the project in Collaborate.
  • Select the device control in the bottom bar. Its tooltip reads Preview your design on various screen sizes. The menu opens showing Desktop, Tablet, and Mobile.
  • Choose a view. The page re-renders at that width inside a device frame. A tick marks the view you are currently in.
  • Switch back to Desktop when you are done. The page returns to full width.
  • Responsive mode is a paid feature
    On plans that do not include it, the control opens an upgrade panel headed Collaborate in Responsive Mode naming the minimum plan required.

    Leaving feedback at a breakpoint

    This is the part that makes responsive testing worth doing inside Atarim rather than in your browser’s developer tools. The feedback carries the context with it.

  • Switch to the view where the problem appears. Check the layout at that width before commenting — the issue may look different from how it was described.
  • Make sure you are in Comment mode.
  • Select the element the feedback is about. A comment box opens, pinned to that element.
  • Describe the problem and send it. A task is created, recording the screen resolution you were viewing at alongside your browser and operating system.
  • Annotate the screenshot if the issue is spatial. Overlaps, cramped spacing, and wrapping problems are far quicker to show than to describe. Learn More About The Annotation Tools.
  • All the usual feedback tools work at every width.
    Tip
    Say the breakpoint in the comment as well, even though it is recorded. “Nav overlaps the logo on mobile” reads instantly in a task list; a resolution buried in the technical details does not.

    Example use cases

    Four situations where switching views before signing anything off saves a round of rework.

    SituationWhat to do
    Navigation on tabletSwitch to tablet and check the menu has not collapsed into overlapping text. It is the width most often skipped, because everyone tests desktop and phone.
    A button label on mobileSwitch to mobile, click the button, and raise the task there. The recorded resolution tells the developer it is not a desktop problem.
    A client reviewing a new designAsk them to look at all three views in one session rather than running separate reviews. Their feedback arrives already tagged with the width.
    Before a page is approvedCheck each breakpoint before setting the page to Approved. Sign-off should mean it works everywhere. Explore Page Approvals.
    Recommendation
    Make tablet a habit. Desktop and mobile get checked because they are the two people carry around; tablet is where most breakpoint problems actually hide.

    Why it is worth the extra minute

    BenefitIn practice
    Fewer irreproducible bugsThe recorded resolution ends the “works on my machine” exchange before it starts.
    One review instead of threeA client checks all three widths in a single session, so there is no separate mobile round to collate.
    Problems found earlierA breakpoint issue caught during review costs a fix; the same issue found after launch costs a fix, a client conversation, and the trust.
    Feedback that is actionableDevelopers get the element, the width, and the browser together, rather than a description they have to interpret.

    Known limitations

    Where responsive mode stops:

  • Three fixed sizes only. You cannot set a custom width.
  • Portrait only. There is no rotation control for landscape.
  • It is a simulation, not a device. It renders your site at that width in your own browser — useful for layout, but not a substitute for testing on real hardware where touch behaviour or device-specific rendering matters.
  • Responsive mode is a paid feature, gated separately from the rest of Collaborate.
  • The breakpoint is recorded, not displayed prominently. It sits in the task’s technical details rather than on the task card.
  • FAQs

    What sizes are the tablet and mobile views?

    Tablet renders at 768 × 1024 and mobile at 390 × 844. Desktop uses your full browser width.

    Can I set a custom width?

    No. The three presets are fixed. For a specific width, use your browser’s developer tools.

    Can I check landscape?

    Not in Atarim — both smaller views are portrait, with no rotation control.

    Does my feedback record which view I was in?

    Yes. Each task stores the screen resolution it was created at, along with your browser and operating system, under Technical Details.

    Can clients use responsive mode?

    Yes, in the same Collaborate session. It is the quickest way to get feedback on all three widths in one round.

    Is this the same as testing on a real device?

    No. It renders your site at that width in your own browser, which catches layout problems but will not surface everything a real phone would.

    Do my comments move if the layout shifts?

    Tasks are pinned to elements rather than positions, so they follow the element. If a page is rebuilt and the element genuinely changes, a task can be re-pointed using Remap task element.

    Common issues

    • The device control opens an upgrade panel. Responsive mode is not included on your plan. The panel names the minimum plan required.
    • The page looks wrong in tablet or mobile view. That may be the finding. Check it is a genuine layout problem rather than the page still loading, then raise it as a task.
    • You cannot rotate to landscape. Not available. Use your browser’s developer tools for landscape checks.
    • A developer says they cannot reproduce it. Point them at the task’s Technical Details, which record the resolution the feedback was left at.
    • You want a width between the presets. Not available in Atarim. Test the specific width in your browser and raise the task from the nearest preset, noting the width in the comment.
    • Clicking navigates instead of commenting. You are in Browse mode. Switch to Comment — this works the same at every width.

    Conclusion

    Checking three widths takes about a minute and removes an entire category of late surprise. The real gain is not the preview — it is that the feedback you leave carries the breakpoint with it, so a mobile problem arrives on the developer’s list already labelled as one.

    Responsive views work alongside every other feedback tool in Collaborate.

    Discover The Annotation Tools For Feedback

    Tips & best practices

    • Check tablet as well as mobile. It is the width most often skipped and where most breakpoint problems hide.
    • Say the breakpoint in the comment even though it is recorded — it reads faster in a task list.
    • Ask clients to review all three widths in one session rather than running a separate mobile round.
    • Check every breakpoint before marking a page approved. Sign-off should mean it works everywhere.
    • Annotate spatial problems rather than describing them. Overlaps and cramped spacing are much quicker to show.
    • Remember it is a simulation. Confirm anything touch-related on a real device before you call it fixed.

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