Make Fields Visible In Print Format
The standard print formats only display certain fields by default. In case the user prefers more information from fields to be displayed, this can be achieved by using the Customize Form feature.
Step 1: Go to Customize Form in Setup Module.
Setup >> Customize >> Customize Form
Step 2: Select the desired form in Enter Form Type field.
Step 3: In the Fields section, click on the field that must be visible in the Print Format and remove the check on Print Hide field.
The field will now be visible in all print formats for that Document type.