What is Ctrl + Alt + Num - keyboard shortcut for?

Popular programs using this shortcut

What this shortcut does in different programs?

1. Microsoft Word 2019 - An em dash  
2. Citrix Receiver - Place an image of the active window onto the RDS Clipboard (similar to ALT+PRINT SCREEN)  
3. PotPlayer 1.7 - Decrease window size  
4. Node Wrangler 3.36 - Merge nodes (Color, subtract)  
5. Adobe After Effects 2021 - Increase or decrease Opacity (or Intensity for light layers) of selected layers by 1%  

All programs

All programs using this shortcut, by category.

Text editing (2)

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Imaging (2)

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System tools (1)

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Media player (1)

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Productivity (1)

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Note: This page includes variations for Ctrl + Alt + numminus
Alt + Ctrl + numminus
Ctrl + Alt + numminus. Restrict to only Ctrl + Alt + numminus.