How to pick the right UI font

Selecting the right font for a user interface involves balancing aesthetics with functionality, focusing on attributes that enhance legibility and clarity across various sizes and devices. Key considerations include a generous x-height, which improves legibility at smaller sizes, and easily distinguishable letterforms, particularly for characters like capital I, lowercase L, and the number 1, which are often confused. Geometric fonts, while visually striking, may exacerbate this confusion. Overall readability at the word level is crucial, with sans serif fonts typically outperforming script fonts due to their simpler forms and enhanced clarity. These factors ensure that the text supports the interface's usability rather than detracting from it by causing confusion.