Mechanical Layer Pair机械相对层设置

参考官网

该功能允许将Layer1和Layer2设置为相对层，这样将对元器件进行镜像操作时，元器件的相关图形也会做层面的改变（参考内置的丝印顶层和底层的关系），如果元器件Footprint中包含更多细节元素如元器件轮廓、布局边框、装配图形等信息时，使用此功能可更方便的查看元器件布局情况。

此菜单一般从 层管理界面View Configuration进入

老版本的AD在 下端Layer Pair进入

新版本在Component Layer Pairs处右击选择对应功能进入

分别选择需要相对的层即可完成配置

机械层定义

仅个人自用推荐

尺寸和注释

Mechanical 1 (M1)：Board outline (it is not recommended to use just the keep-out layer, since that can be used for other things also).建议作为板框层使用，不用做禁布层或其他用途

Mechanical 2 (M2)：PCB notes and comments for the PCB manufacturer/assembler (included in Gerber output).需要PCB生产或装配知悉的注释和要求，生成Gerber时输出此层

Mechanical 3 (M3)：PCB notes and comments for the PCB manufacturer/assembler (included in Gerber output). (M2)的补充如果一层注释不够用则再使用一层，按需添加

Mechanical 4 (M4)：General notes and comments that the PCB manufacturer/assembler does not need to know about (not included in Gerber output).不需要PCB生产或装配知悉的注释和要求，如机械尺寸图等，生成Gerber时不输出此层

装配边框和元器件轮廓

Mechanical 11 (M11)：Top layer courtyard and assembly information (paired with M14). 顶层元器件装配边框信息（与M12相对）&& Top layer Component Outline & Terminal Outline

Mechanical 12 (M12)：Bottom layer courtyard and assembly information (paired with M11).底层元器件装配边框信息（与M11相对） Bottom layer Component Outline & Terminal Outline

3D模型

Mechanical 13 (M13)：Top layer component body information (3D models and mechanical outlines, paired with M18).顶层元器件实体尺寸信息（3D模型和机械边框，与M18层相对）

Mechanical 14 (M14)：Bottom layer component body information (3D models and mechanical outlines, paired with M13).底层元器件实体尺寸信息（3D模型和机械边框，与M13层相对）

布局边框

eMechanical15（M15）:Courtyard Outline This normally includes a cross-hairs at the origin of the component. 布局边框TOP一般也包括圆心标注的十字准线

eMechanical16 （M16）:Courtyard Outline This normally includes a cross-hairs at the origin of the component. 布局边框BOTTOM 一般也包括圆心标注的十字准线