Xcode SKTileMapNode and SKSpriteNode

I have created a SKTileMapNode, inserted a SKSpriteNode in the scene. The SKSpriteNode is a parent of the SKSTileMapNode. I Try to modify the SKSpriteNode but i can't access it from the Interface Builder. How can i select the SKSpriteNodes in a SKTileMap fia keyboard. If i use Select all CMD + a i have all object.