usability - What is the significance of the Sign Up button on

So Facebook updated their login page. I couldn't help but wonder the reason behind having a Sign Up button in the header when there already is a Sign Up form in the body section. What aspect of UX

UI/UX Testing: Definition, Checklists and Tools

usability - I agree check box or buttons - User Experience Stack Exchange

Radio button design: easy selection and decision-making - Justinmind

What is Usability - The Ultimate Guide — updated 2023

Usability for Nerds/The design of a button should reflect its importance - Wikibooks, open books for an open world

Part of the visualized causal network for the usability issue 'Back

Beautiful Examples of Login Forms for Websites and Apps - Designmodo

5 Registration Form Usability Guidelines - Usability Geek

Usability Testing: what, how and why? - Optimal Workshop

Website Usability Surveys: Capturing Feedback to Improve User Experience

8 Usability Testing Methods That Work (Types + Examples)