This may be a dumb question. But for example: how can I change hundreds of shapes in Metal1 to Metal2 in an easy way? I am using IC61. Thanks in advance.
If you have them selected, you can use Edit Properties, hit the common button, and change the layer in the cyclic field. Or you could use the property assistant (Window->Assistants->Property Editor), change the top left cyclic to All, and then next to the + for Layer click where it says Metal1 drawing, and then you can change on the drop-down cyclic field to Metal2 drawing.
Or you could use Tools->Find/Replace.
Or you could see this post