In this stack you can fuse two layers and you can drag other stacks into it. You don't need to edit the images, the layers remain independent map layers. Blend modes need two map layers to work their magic. You can add both images and gradient by changing the blending mode.
The simulator for testing the trigger position is visible only in preview. Also a dashboard is available in Edit Mode with basic settings, the settings changes are reflected in the UI.
The stack deliver also a project for demostration with several examples, included projects for all RapidWeaver frameworks: FOUNDATION, FOUNDRY, UIKIT, PLATFORM and SOURCE.