Data Sheet

Schematic Capture
37
Naming, Ordering and Navigating Sheets
Before we lay out the circuitry on this sheet we need to do a little housekeeping. While it’s not
necessary it is often helpful to name the different sheets on the schematic and also to order
them in some sensible fashion. We can do both of these things via the Edit Sheet Properties
command on the Design Menu.
The Edit Sheet Properties dialogue form
The Sheet Title is what will be displayed and should therefore reflect the contents of the sheet.
In our case let’s name it ‘Analog, Reference & Power’.
Sheets on the schematic are organized by Sheet Ordinal and by default these are 10, 20 and so
on. A sheet with an Ordinal of 20 will therefore appear behind the first sheet (default Ordinal
10). If you prefer purely numeric nomenclature we can change the sheet name to be ‘2’, to
better reflect its position in the design structure.
The default sheet names may seem inconsistent. This is because Proteus also has
a Master Sheet, present in all designs, which allows the application of a company
logo, revision number, author and other schematic information. This is beyond the
scope of this tutorial but more information can be found in the Templates chapter of
the accompanying reference manual (Help Menu – Schematic Capture Help).
Sometimes, it is desirable to have a base annotation for a sheet; this means that the global
annotator will increment from the value entered in this field. For example, if we set this to be 100
then the first resistor placed on the sheet would be annotated as R100. When left at its default
value the global annotation will continue from its current position – this is fine for the purposes
of the tutorial.
Setting initial annotation for sheets is useful as it can guide the Global Annotator
when batch annotating. It can - if you choose - also then be honored when
annotating physically via the Automatic Annotator in the PCB Layout Module.