# Functional Requirements

## user stories

* name: PDF browser
  * role: user
  * functionality: view and navigate PDF documents
  * benefit: select page to add signature
* name: load signature picture
  * role: user
  * functionality: load a signature picture file
  * benefit: easily add signature to PDF
* name: geometrically adjust signature picture
  * role: user
  * functionality: adjust the size and position of the signature picture
  * benefit: ensure the signature fits well on the PDF page
* name: graphically adjust signature picture
  * role: user
  * functionality: background removal, contrast adjustment...
  * benefit: easily improve the appearance of the signature on the PDF without additional software.
* name: draw signature
  * role: user
  * functionality: draw a signature using mouse or touch input
  * benefit: create a custom signature directly on the PDF if no pre-made signature is available.
* name: save signed PDF
  * role: user
  * functionality: save/export the signed PDF document
  * benefit: easily keep a copy of the signed document for records.
* name: preferences for app
  * role: user
  * functionality: configure app preferences such as `theme`, `language`.
  * benefit: customize the app experience to better fit user needs
* name: remember preferences
  * role: user
  * functionality: remember user preferences for future sessions
  * benefit: provide a consistent and personalized experience