I can't use Move Forward / Backward event or Move Right / Left event. I can't find it in the blueprints. I use the unreal 5

Development Programming & Scripting Blueprint
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BluePrints

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Those nodes do not exist unless you add the appropriate input mapping and name it accordingly. Look for input under project preferences.

Ideally, look into the new Enhanced Input as the old system will be eventually phased out.

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Zero,
You also need a movement component on your actor. If it is a pawn, you can add the FloatingPawnMovement component. If it is a character then you can add the CharacterMovement component. The forward/backward, right/left events should be available and function.