PCB Annotation uses the physical location of components on the PCB to determine their designation. This allows positional information to be effectively encoded into a component's designator and can be very helpful when debugging an assembled PCB. Prepare a design for additional annotation.Annotate multi-channel designs using the default naming scheme as specified in the Project Options.Annotate components based on their position in the schematic design.In summary, use Schematic Level Annotation to: It is most useful for simple designs that do not use Device Sheets, but because it allows the order of processing to be specified as well as the option to complete existing packages for multi-part components, it is also a pre-requisite to Board Level Annotation. Schematic Level Annotation uses a purely logical view of the design to determine component designators. The choice of Annotation Tool depends on a number of factors including the type of design, personal preference, and company policy and procedures. There are three approaches to annotating a design. Traditional Methods of Design Synchronization.To Synchronize your PCB Design back to the Schematic Design.To Synchronize your Schematic Design forward to the PCB Design.Forward Synchronization and Back Synchronization.Design Synchronization - Finalizing the Annotation Process.Controlling the Display of the Designator on the PCB.Displaying Physical Names in your Compiled Documents.Board Level Annotation and Device Sheets.

Using Compiled Sheet Annotation in your Project.

Using Compiled Sheet Annotation in your Board Level Annotation.

Custom Annotation of your Compiled Sheets.

Schematic Sheet Numbering and Device Sheets.Additional Schematic Annotation Commands.

Altium annotate schematics