You can add Components (a Part calling a PCB Footprint) and PCB Documentation symbols into the PCB design editor.
PCB Components are used to define a Part body and a PCB Footprint Symbol. These can be defined as a Part using just a Footprint or both a Footprint and a Schematic Symbol if using both Schematics and PCB design editors.
PCB Components appear in any Parts or Netlists lists generated.
PCB Documentation symbols are used for items such as probe points for testpoints or items which must not appear on the Parts or Net list. Doc Symbols do not have any Part information but are managed in the Library Manager. PCB and Schematic documentation symbols are not interchangeable but may have the same function e.g. a title block. In this instance they would have to appear in both documentation symbol libraries, the common shape information could be copied and pasted from one library to another, detail such as the layers would not be pasted if copying from Schematic to PCB.
Related Topics
Library Manager | PCB Footprint Library | Footprint Wizard | Parts Wizard | New - PCB Doc Symbol | Insert Doc Symbol | Insert Component