You can reinstate a bookmark by just creating it again. The hyperlinks can't tell the difference and will update to point at the newly re-created bookmark.

A second alternative is to select the area you want the replacements to happen in (excluding the one you want preserved) and replace only in the selection.

A third alternative is to put the bookmarked item into a locked content control (or group it) to effectively insulate it from any accidental updates or replacements.

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Andrew Lockton
Chrysalis Design, Melbourne Australia