【What is Layer Comps】

　　Designers often create multiple compositions（comps） of a page layout to show clients. Using layer comps, you can create, manage, and view multiple versions of a layout in a single Photoshop file.
　　A layer comp is a snapshot of a state of the Layers panel. Layer comps record three types of layer options:

Layer visibility—whether a layer is showing or hidden.

Layer position in the document.

Layer appearance—whether a layer style is applied to the layer and the layer’s blending mode.

Note:Unlike layer effects, Smart Filter settings cannot be changed across layer comps. Once a Smart Filter is applied to a layer, it appears in all layer comps for the image.

　　You can export layer comps to individual files.

　　Choose File > Scripts > Layer Comps to Files and then choose the file type and set the destination.

参考：https://helpx.adobe.com/photoshop/using/layer-comps.html