Fix the font size Shortcut
I use Evernote daily. I pay for the premium membership and use it mostly to store articles and important notes I know I’ll want to use later. In short I find it a great service and worth paying for.
However the shortcuts for changing the font size on Mac are standard across every app I use (⌘= and ⌘-). I would be hard pressed to find an app that breaks from this standard. So I am not sure which productivity app you are refering to (MS Office?). It is fine if you want to change the shortcut on a Windows version to match what they do there, but don’t mess with standard OS shortcuts on the Mac. When I want to change the font size I trust that the application is going to do the right thing.
BTW there is a standard for Zoom on the Mac as well. Pinch to Zoom and ⌘>, ⌘<
Thankfully on a Mac I can override your changes back to the system standard via System Preferences > Keyboard > Shortcuts > App Shortcuts.
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Evernote, v6.5