Where it the checkbox for wrapping text in "View Source"?

[carla_rogers]

I understand when viewing page source through view->developer->view source, it is possible to have the text wrap by checking a box for that preference, always has to be renewed on a new view of source.

QUESTION: Where is the checkbox for wrapping text in View Source?’
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[289wk]

Developer Tools window will word-wrap:

[Mythical5th]

It scrolls off the top of the page!