Is there such functionality in Construct?
For example, in LayoutStage1, I want it to have EventSheetStage1 and during the runtime, either MarioActionEventSheet OR SonicActionEventSheet will be invoked. Something along this line.
Imagine a stage where you can choose between Sonic and Mario, all of the stage's events will be in EventSheetStage1, while Mario's action will be in MarioActionEventSheet and Sonic's action will be in SonicActionEventSheet.
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OK, sorry, I was searching the incorrect word.
I should search for "Include Event Sheet" instead of "extend". All right.
This works: scirra.com/manual/82/includes