Changing the visibility of your private contributions
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In the top right corner of GitHub, click your profile picture, then click Your profile.  
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Above the contribution calendar, click Contribution settings.  
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Click Private contributions to show or hide private contributions on your profile. 
Changing the visibility of achievements
- In the upper-right corner of any page on GitHub, click your profile picture, then click Settings.
- Under "Profile settings", select or deselect Show Achievements on my profile.
- Click Update preferences.
Hiding an individual achievement on your profile
You can hide an individual achievement on your profile. When hidden, badges are only visible to you.
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In the top right corner of GitHub, click your profile picture, then click Your profile.  
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Under "Achievements", click the achievement you want to hide.  
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Click .  
Next steps
For more information about contribution visibility, see Profile contributions reference.