When creating a layer, you must assign it a type in addition to the name. The layer type allows the program to correctly interpret the objects present in the layer.
Table of layer types
| Layer type | Description | Document type | 
|---|---|---|
| Drawing | A generic layer that is not assigned a particular function. | All | 
| Library | In this layer are inserted the objects of Frame type and any information extraneous to the symbols. | Symbol libraries and footprint libraries | 
| Board | Contains the PCB profile. | PCB and footprint libraries | 
| Top copper | Top copper side of PCB. | PCB and footprint libraries | 
| Bottom copper | Bottom copper side of PCB. | PCB and footprint libraries | 
| Inner copper | Copper layers inside the board. | PCB | 
| Top image | Contains the realistic image of the components on the top of the board. | PCB and footprint libraries | 
| Bottom image | Contains the realistic image of the components on the bottom of the card. | PCB and footprint libraries | 
| Top assembly | Contains the black and white graphic drawing of the components on the top of the board. | PCB and footprint libraries | 
| Bottom assembly | Contains the black and white graphic drawing of the components on the bottom of the board. | PCB and footprint libraries | 
| Top courtyard | Contains the component footprint areas on the top of the board. | PCB and footprint libraries | 
| Bottom courtyard | Contains the component footprint areas on the bottom of the board. | PCB and footprint libraries | 
| Top legend | Legend or silkscreen on the top side of the board. | PCB and footprint libraries | 
| Bottom legend | Legend or silkscreen on the bottom side of the board. | PCB and footprint libraries | 
| Top soldermask | Soldermask on the top side of the board. | PCB and footprint libraries | 
| Bottom soldermask | Soldermask on the bottom side of the board. | PCB and footprint libraries | 
| Top pastemask | Pastemask on the top side of the board. | PCB and footprint libraries | 
| Bottom pastemask | Pastemask on the bottom side of the board. | PCB and footprint libraries | 
| Top gluemask | Gluemask on the top side of the board. | PCB and footprint libraries | 
| Bottom gluemask | Gluemask on the bottom side of the board. | PCB and footprint libraries | 
| Top mechanical | Information on the mechanical processing of the top side of the board. | PCB and footprint libraries | 
| Bottom mechanical | Information on the mechanical processing of the bottom side of the board. | PCB and footprint libraries | 
| Top documentation | Documentation of the top side of the board. | PCB and footprint libraries | 
| Bottom documentation | Documentation of the bottom side of the board. | PCB and footprint libraries | 
| Top carbonmask | Carbonmask top side of the board. | PCB and footprint libraries | 
| Bottom carbonmask | Carbonmask bottom side of the board. | PCB and footprint libraries | 
| Top goldmask | Goldmask top side of the board. | PCB and footprint libraries | 
| Bottom goldmask | Goldmask bottom side of the board. | PCB and footprint libraries | 
| Top heatsinkmask | Heatsinkmask top side of the board. | PCB and footprint libraries | 
| Bottom heatsinkmask | Heatsinkmask bottom side of the board. | PCB and footprint libraries | 
| Top peelablemask | Peelablemask top side of the board. | PCB and footprint libraries | 
| Bottom peelablemask | Peelablemask bottom side of the board. | PCB and footprint libraries | 
| Top silvermask | Silvermask top side of the board. | PCB and footprint libraries | 
| Bottom silvermask | Silvermask bottom side of the board. | PCB and footprint libraries | 
| Top tinmask | Tinmask top side of the board. | PCB and footprint libraries | 
| Bottom tinmask | Tinmask bottom side of the board. | PCB and footprint libraries | 
| Pads | Pads. | PCB and footprint libraries | 
| Vias | Vias. | PCB and footprint libraries | 
| Holes | Holes. | PCB and footprint libraries | 
| Nets | Connection lines. | PCB | 
| Reference marks | Reference marks. | PCB and footprint libraries | 
| Board documentation | Documentation of the board. | PCB and footprint libraries | 
| Keepout | Keepout areas. | PCB and footprint libraries |