Layer tags

You can use tags to automatically merge or ignore them when exporting, or set them as reference layers.

You just have to use the tag in the names of the layers. These are the available tags:

In this example:
The group will be exported as a single layer with the Layer 04 visible. Layer 03 will not be visible. Layer 02 will be visible only if the option Export “reference” layers is checked.
Layer 01 will be exported as a single layer with its transparency applied in the alpha chanel.