Understandable Information UI operation

• Information and the operation of the user interface must be understandable.

1. Readable

• Make text content readable and understandable.

Guideline 3.1 Readable (opens in a new tab):

• Success Criterion 3.1.1 Language of Page
• Success Criterion 3.1.2 Language of Parts

2. Predictable

• Make Web pages appear and operate in predictable ways.

Guideline 3.2 Predictable (opens in a new tab)

• Success Criterion 3.2.1 On Focus
• Success Criterion 3.2.2 On Input
• Success Criterion 3.2.3 Consistent Navigation
• Success Criterion 3.2.4 Consistent Identification
• Success Criterion 3.2.6 Consistent Help

3. Input Assistance

• Help users avoid and correct mistakes.

Guideline 3.3 Input Assistance (opens in a new tab):

• Success Criterion 3.3.1 Error Identification
• Success Criterion 3.3.2 Labels or Instructions
• Success Criterion 3.3.3 Error Suggestion
• Success Criterion 3.3.4 Error Prevention (Legal, Financial, Data)
• Success Criterion 3.3.7 Redundant Entry
• Success Criterion 3.3.8 Accessible Authentication (Minimum)
• Success Criterion 3.3.9 Accessible Authentication (Enhanced)