How can I make advanced tool-tips(Ctrl+Alt)?

There are some Blend Options in AnimMontage editor. When I try to see tool-tip of one, it shows:

249793-001.png

And when I press Ctrl+Alt keys, new tool-tip appears:

I tried to see BlendOption's source code, but it only has normal comments.

249795-003.png

Then where the advanced tool-tips’ data is? I want to try to make them.

Those are loaded from documentation files. Here is the doc file for that specific enum:

https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Documentation/Source/Shared/Enums/EAlphaBlendOption/EAlphaBlendOption.INT.udn

You can add your own by creating it in Engine/Documentation/Source/Shared/Types/YourClass/YourClass.INT.udn
The editor will automatically detect it and show you the ctrl+alt option.

You can learn the syntax by reading the existing documentation files.

Let me know if this is what you were looking for and mark the answer as correct.

Enjoy!