Changed pages include:

• guidelines/index.html - view
• understanding/index.html - view
• techniques/index.html - view
• understanding/compatible.html - view
• understanding/resize-text.html - view
• understanding/audio-description-prerecorded.html - view
• understanding/captions-prerecorded.html - view
• understanding/error-identification.html - view
• understanding/error-prevention-all.html - view
• understanding/audio-description-or-media-alternative-prerecorded.html - view

There are more changes not included in the list