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Filip_Fusek
March 6, 2024
Question

Thin gray line between the frames in the prototype mode

  • March 6, 2024
  • 13 replies
  • 1487 views

Hi. I have a question, is it my error or is it more of a rendering of the image when prototyping? I have a project, I divided the website sections into individual frames. I then “wrapped” these frames into one large frame. They are aligned perfectly every single pixel. Unfortunately, in the prototypes view I occasionally get such a thin gray line between the frames as below in the screenshot. How to deal with this?

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13 replies

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Leo Stephanou
Leo Stephanou
New Member
October 3, 2025

I managed to fix this by selecting the entire page then adjusting the Y axis value from 360.84 to 360 (ie. no decimal points, only whole numbers). II then adjusted each frame layout within the page to make sure their heights where also set to whole numbers eg. 845.97 to 856). This fixed the issue entirely. See attached images.

Erick Laureano Maúrtua
Erick Laureano Maúrtua
New Member
February 10, 2026

Now, in 2026 Feb, the same problem with that line. Please, any update solving the issue? 

 

unfuer
unfuer
New Member
June 5, 2026

Hey, solved the issue. The only problem is fraction values.

Checklist to fix:

  • Change the viewport to ‘Actual size (100%)’. If the problem is still there, check you system settings. Your monitor should use correct sizing too. It will fully solve the issue at least in one type of viewport.
  • Check your design for fraction values of height and switch those to natural numbers. For example, change 1032,10 px to 1032 px.
  • Find a ‘bad layer’. Bug happens, because resizing the viewport makes fractional values appear even if there is no such thing in the original design. Try moving your layers around and check for changes in the viewport.

What could be the ‘bad layer’:

  • One layer covering another. Even if their coordinates are the same, while resizing they could change, so one layer will ‘stick out’.
  • No background on the main frame. If fractional values appear, they may create gaps between containers. Try adding a background for the whole prototype or use vector figures to close the holes.

I hope that will help

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