This is the fourth in a series of tips highlighting features available in Overleaf v2. If you'd like to try v2 for yourself, the beta is now open to the public at https://v2.overleaf.com.
Overleaf v2 offers an impressive collection of new and upgraded collaboration features. The collaborative editing is faster and smoother than in Overleaf v1, and it shows you where your collaborators' cursors are as they type. The new track changes mode lets you see exactly what has been changed by your collaborators, and allows you to accept or reject each individual change. You can also comment on ranges of text in your document for precise communication.