Use the Gitlens extension. It supports various options. Once installed, you can use Alt+B to show the full file blame information.
Answer from Parag Diwan on Stack OverflowUse the Gitlens extension. It supports various options. Once installed, you can use Alt+B to show the full file blame information.
If you use the GitLens plugin, you can also use the "File Annotations" icon in the top right of Visual Studio Code:

Or use the "GitLens: Toggle File Blame" command.
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I was just issued a new company laptop and have lost all of my VS extensions. I had one that did line by line git blame, so that I could see who had added a line of code six months ago and go ask him why.
I can't find it again in the marketplace. Any ideas?
[Answer] Thanks to https://stackoverflow.com/questions/25076311/how-to-show-git-blame-in-visual-studio-2013.
Right click in the source window, choose "git", then "Blame (Annotate)".
No extension is required
See e.g. https://stackoverflow.com/questions/25076311/how-to-show-git-blame-in-visual-studio-2013 - afaik the functionality is available out of the box in VS. No extensions needed.
Just Right-click -> Git -> Blame (Annotate) I think.

Try Quick Blame
Annotate can be slow on large files with a lot of churn
https://marketplace.visualstudio.com/items?itemName=EmmanuelAdebiyi.vs-quick-blame
Are you the kind of a guy who would like to have git blame annotations inside the text editor sound and clear? And think that the git lens gives too messy presentation nevertheless it has huge amount of features and tools that are too complicated to use. If you like to use the git on the terminal but would like to have a better way of checking the blame annotations than via the terminal. No worries. After a long time of delay I finally got this extension written. The extension does simply one thing, git blame, hence the name simply blame and it presents the blame annotations clearly on the each line of the code. Go check the extension out now. You can install the extension from the VS Code extensions marketplace by searching Simply Blame. Repository: https://github.com/JamiLu/simply-blame