Hi @Zabrell, thanks for posting in the Lucid Community! Because your green, outline shape is on a different layer, it will be placed on top of other shapes when toggled on. If the shapes you are wanting to connect are on their own layer as well, you can reorder the layers by clicking the Layers icon at the bottom-right of the canvas, and then dragging them in the order you would like them to appear.
If the shapes you are wanting to connect are not on a layer, but on the page directly, you will not be able to arrange them in front of the shapes on the layer when it is toggled on. The layer will need to be toggled off to edit these shapes.
For more information, check out our article on Layers from the Lucid Help Center. For an example on how to use Layers in conjunction with other features to create a button, please take a look at this Community post (in English). Please let me know if you have any further questions!