The processes discussed to this point are effective when you have one reviewer at a time. Sometimes, however, multiple reviewers all return edited versions of a document at the same time. In this case, it may be quicker to review all of these changes at once, rather than one review at a time. For this purpose, you can merge documents in Calc.
To merge documents, all of the edited documents need to have recorded changes in them.
Open the original document.
Select Edit > Changes > Merge Document (Figure 113).
A file selection dialog opens. Select a file you want to merge and click OK.
After the documents merge, the Accept or Reject Changes dialog opens, as in Figure 122, showing changes by more than one reviewer. If you want to merge more documents, close the dialog and then repeat steps 2 and 3.
Now all of the changes are combined into one document and you can accept or reject the changes. Changes from different authors appear in different colors in the document, as shown in Figure 123. In this example, all of the changes from Peter are blue and the changes from Gina are red.