For example I have some big layout. And there are many metals with one layer name, if I do not want to go ahead and select each layer, go to its properties and replace its layer to another, and I want specific type of layer within design changed to another type right away automatically, how can it be done?
Probably the easiest way (without selecting the objects of interest and using the Property Editor Assistant) is to use the Find/Replace features.
Go to Tools->Find/Replace
Search for: any shape (for example) Click Add Criteria
Select a layer to search for.
In the Replace section : select target layer.
Then click Replace All.