To save a paper to a library, click the icon on the bottom row of the paper card or the icon on the paper's page. The paper will be automatically saved to your default library. If the paper has been previously saved to a library, a pop-up window will appear. To save to additional or different libraries, click the icon again and click the Checkmark next to the library name(s) to select the library (or libraries) you wish to add the paper to. You can also create a new library to which to save a paper by typing in a name where prompted by "Enter new library name." Click Done to save your changes.