EAGLE Help

LAYER


Function
Changes and defines layers.

Syntax
LAYER layer_number
LAYER layer_name
LAYER layer_number layer_name
LAYER -layer_number

See also DISPLAY

Choose Drawing Layer

The LAYER command with one parameter is used to change the current layer, i.e. the layer onto which wires, circles etc. will be drawn. If LAYER is selected from the menu, a popup menu will appear in which you may change to the desired layer. If entered from the command line, 'layer_number' may be the number of any valid layer, and 'layer_name' may be the name of a layer as displayed in the popup menu.

Certain layers are not available in all modes.

Define Layers

The LAYER command with two parameters is used to define a new layer or to rename an existing one. If you type in at the command prompt e.g.

LAYER 101 SAMPLE;
you define a new layer with layer number 101 and layer name SAMPLE.

If a package contains layers not yet specified in the board, these layers are added to the board as soon as you place the package into the board (ADD or REPLACE).

The predefined layers have a special function. You can change their names, but their functions (related with their number) remain the same.

If you define your own layers, you should use only numbers greater than 100. Numbers below may be assigned for special purposes in later EAGLE versions.

Delete Layers

The LAYER command with the minus sign and a layer_number deletes the layer with the specified number, e.g.

LAYER -103;
deletes the layer number 103. Layers to be deleted must be empty. If this is not the case, the program generates the error message

"layer is not empty: #"

where "#" represents the layer number.

The predefined standard layers cannot be deleted.

Supply Layers

Layers 2...15 are treated by the Autorouter as supply layers, provided their name starts with the $ character and there is a signal with an identical name but without the leading $.

Predefined EAGLE Layers

Layout

1 Top Tracks, top side
2 Route2 Inner layer (signal or supply)
3 Route3 Inner layer (signal or supply)
4 Route4 Inner layer (signal or supply)
5 Route5 Inner layer (signal or supply)
6 Route6 Inner layer (signal or supply)
7 Route7 Inner layer (signal or supply)
8 Route8 Inner layer (signal or supply)
9 Route9 Inner layer (signal or supply)
10 Route10 Inner layer (signal or supply)
11 Route11 Inner layer (signal or supply)
12 Route12 Inner layer (signal or supply)
13 Route13 Inner layer (signal or supply)
14 Route14 Inner layer (signal or supply)
15 Route15 Inner layer (signal or supply)
16 Bottom Tracks, bottom side
17 Pads Pads (through-hole)
18 Vias Vias (through-hole)
19 Unrouted Airwires (rubberbands)
20 Dimension Board outlines (circles for holes)
21 tPlace Silk screen, top side
22 bPlace Silk screen, bottom side
23 tOrigins Origins, top side
24 bOrigins Origins, bottom side
25 tNames Service print, top side
26 bNames Service print, bottom side
27 tValues Component VALUE, top side
28 bValues Component VALUE, bottom side
29 tStop Solder stop mask, top side
30 bStop Solder stop mask, bottom side
31 tCream Solder cream, top side
32 bCream Solder cream, bottom side
33 tFinish Finish, top side
34 bFinish Finish, bottom side
35 tGlue Glue mask, top side
36 bGlue Glue mask, bottom side
37 tTest Test and adjustment inf., top side
38 bTest Test and adjustment inf. bottom side
39 tKeepout Nogo areas for components, top side
40 bKeepout Nogo areas for components, bottom side
41 tRestrict Nogo areas for tracks, top side
42 bRestrict Nogo areas for tracks, bottom side
43 vRestrict Nogo areas for via-holes
44 Drills Conducting through-holes
45 Holes Non-conducting holes
46 Milling Milling
47 Measures Measures
48 Document General documentation
49 Reference Reference marks
51 tDocu Part documentation, top side
52 bDocu Part documentation, bottom side

Schematic

91 Nets Nets
92 Busses Buses
93 Pins Connection points for component symbols
with additional information
94 Symbols Shapes of component symbols
95 Names Names of component symbols
96 Values Values/component types


Index Copyright © 1999 CadSoft Computer GmbH