If your supervisor has flagged a specific chapter the methodology isn't sufficiently justified, the literature review reads as descriptive rather than analytical, the discussion chapter restates findings rather than interpreting them you don't need to send the full dissertation. Chapter by chapter editing targets the specific section that needs work while leaving your other chapters untouched. The editor matches the academic register, terminology, and referencing conventions of your wider document so the edited chapter doesn't read as stylistically discontinuous with the rest.
Single chapter editing is also the most common starting point for PhD students mid-thesis a chapter that's been written and revised several times but still isn't where it needs to be benefits from a fresh editorial perspective that doesn't carry the assumptions built up over multiple self revisions. Any chapter below can be edited as a standalone, or any combination you specify.
Post-viva corrections editing
Post-viva minor or major corrections are a specific and common editing need that requires a different approach from standard dissertation editing. The examiner report sets the agenda each correction point needs addressing in the text, with a clear response document summarising how each was resolved so the supervisor and internal examiner reviewing the corrected thesis can verify compliance without re-reading the whole document. Minor corrections (typically a few months' work) and major corrections (typically up to a year) are both supported. Send your examiner report alongside your thesis and we'll work through each point systematically.