A Page is the area that occupies the entire viewport of the screen during its current state. It organizes information while considering:

• Display technology.
• Navigation structures and interactions.
• Message display characteristics.

Mobile Display Elements

Message Display Characteristics

Legibility: Refers to the ease with which the elements (letters, numbers, symbols, etc.) can be detected and discriminated from one another.

• Font Design
• Upper/lower case
• Letter height
• X-height
• Stroke width/weight
• Letter/line spacing
• Contrast
• Illumination/luminance

Conspicuity: In addition to involving legibility, it also implies other display characteristics. It is nicely summed up by the notion of signal/noise ratio–the ease with which a given piece of information is detectable in the presence of other competing information.

• Design presentation:
• Spatial coding (grouping)
• Shape coding
• Color coding
• Temporal coding
• Size coding
• Pictograms, maps, images
• Attention/target value

Readability: In the display of messages we can affect another property of the message– its readability–by the actual choice of words, the sentence structure and the appropriate language(s).

• Communication
• Language
• Words
• Syntax
• Reading goals: Skim, scan, search, comprehension, evaluation

Pleasurability: (branding, compatibility, appropriateness, experience) Good user experience, consistent with the visual character of the surrounding architecture, appropriate ‘style’ to the activity, emotional and aesthetic benefits.

• Holistic viewpoint of ‘user’
• Based-on individual users’ interests, experiences, and activities
• User relevance and participation
• Text vs. subtext

Comprehension: Understanding the meaning of a given display so that an associated consequent course of action is both apparent and possible. Comprehension involves recognition as a necessary but not sufficient condition.

User Characteristics

Looking and Finding: Detection and Discrimination. Detection: Determining the presence of an object, target or symbol.

Descrimination: Determining that differences exists; discriminating between target objects and non-target objects is determining differences on the basis of which identifications can be made.