Cant find where to turn on text boundaries

Looked everywhere, and under Options. Can’t find where to turn on Text Boundaries. I have bone to View and checked Tex Boundaries - but nothing happens. Turned it off, turned it on, so forth, nothing.

View>Text Boundaries has an effect only if View>Formatting Marks is enabled. It can be considered as a sub-category for “formatting marks”.

When enabled Text Boundaries causes a light gray rectangle to be displayed to show where text will be laid out in the page. This rectangle is within the page margins, excluding header and footer.

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Bug 74386 - UI: Provide obvious way to turn full-page text boundaries on/off, independent from Show non printing characters