Testing responsive designs in prototype in Figma - Step-by-Step Guide

Introduction

Responsive design testing in prototypes helps you see how your design looks on different screen sizes. It solves the problem of making sure your design works well on phones, tablets, and desktops before building it.

When you want to check if buttons and text resize correctly on mobile screens

When you need to see how a menu behaves on a tablet versus a desktop

When you want to test if images stay clear and well placed on different devices

When you want to share a prototype with others and show how it adapts to screen size

When you want to fix layout issues before handing off to developers

Steps

Step 1: Open your design file

- Figma desktop app or web app

Your design frames and components appear on screen

Step 2: Select the frame you want to test

- Layers panel or canvas

The frame is highlighted and ready for prototyping

Step 3: Click the Prototype tab in the right sidebar

- Right sidebar

Prototype settings appear for the selected frame

Step 4: Set the frame’s resizing behavior

- Design tab > Constraints section

Frame resizes automatically when the prototype window changes size

💡 Choose 'Scale' or 'Resize' to test responsiveness

Step 5: Click the Present button (play icon) at the top-right

- Top-right corner of Figma window

Prototype opens in a new window

Step 6: Resize the prototype window by dragging its edges

- Prototype window edges

Design adjusts layout and elements respond to new window size

Step 7: Interact with prototype elements to test behavior

- Prototype window

You see how menus, buttons, and content respond on different sizes

Before vs After

Before

Prototype window fixed size shows design only for desktop view with 1440px width

After

Prototype window resized to 375px width shows design adapting for mobile view with stacked elements and readable text

Settings Reference

Resize behavior

📍 Design tab > Constraints section

Controls how frames and components adjust when the prototype window size changes

Default: Fixed

Device frame

📍 Prototype tab > Device dropdown

Shows the prototype inside a device frame to simulate real device look

Default: None

Presentation zoom

📍 Prototype window toolbar

Controls how the prototype fits inside the preview window

Default: Fit to screen

Common Mistakes

Not setting resize behavior on frames

Frames stay fixed size and do not adapt when prototype window changes size

Set frames to 'Scale' or use Constraints in Design tab to enable responsiveness

Testing prototype only on desktop without resizing window

You miss how design behaves on smaller screens like phones or tablets

Manually resize prototype window or use device frames to test multiple screen sizes

Summary

Testing responsive designs in prototypes helps ensure your design works on all screen sizes before development.

Use the Design tab to set frame resize behavior and open the prototype in presentation mode.

Resize the prototype window or use device frames to see how your design adapts to different devices.