proportional scaling with Shift Key dos not work InDesign 20.3

Hi @stefang14945369:

One more note to add to Eugene's list of suggestions: we have had multiple reports of keyboard shortcuts not working because of interference from other applications—most typically anti-malware or anti-virus apps. Webroot caused such a big issue for folks that they added the steps needed to stop the interference with InDesign's shortcuts on the support page on their website.

Try restarting your computer and only open InDesign. Do the shortcuts work again? If no, disable the start-up applications and restart one more time and try again. Once you know that this is a possibility, if it is the issue, just being aware of it can help you zero in on the problem app.

~Barb 

Works for me on Windows 10

Didn't try the more up to date Mac

What's your Os and system specs?

Any third party apps? WebOS, Typeface, Magnet? 

Basic fixes

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Try resetting your preferences:

InDesign 19.3 and newer go to Preferences > General > and click on "Reset Preferences on Quit" and then quit and restart.

Or
Windows: Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files.
macOS: While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files.
A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog.



More in-depth cleanse of preferences
https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html

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Reinstalling rarely fixes everything - you can do a complete reinstall using the
Creative Cloud Cleaner Tool https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html