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TLDR - Edit > Preferences > General > Use Legacy Free Transform :)

This tutorial goes over how to bring back the legacy behavior in Photoshop where you had to hold shift to scale proportionally. For whatever reason Adobe decided to change this behavior in a somewhat recent update to the tool, and if you're a long time Photoshop user to me, it's pretty hard to break old habits which makes that change frustrating.

Luckily changing the behavior back to needing to hold shift in order to scale proportionally inside Photoshop is quite easy to do! Hope this is helpful.

Have any questions about what you've seen in the video? Feel free to leave a comment!