Word Wrap settings are syntax and document dependent. Modifications done for syntax, will be applied for all new documents of current syntax and for documents which do not have personalized settings (done via View→Editor or Word Wrap toolbar icon).
In some cases, in addition to personalized setting for document, word wrap can be automatically disabled, if document opened are too large. This is performance optimization done for speed up large logs loading. Can be modified with XML flag.
Defines, in symbols, size of text editor page.
You can see current page width margin on screen, if View->Editor->Page Width is enabled.
Show visual glyphs for word wrap - option controls, if visual glyphs for wrapped lines should be shown on right margin (sometimes on left margin also).