In setup step 2, I made the following setting:
The typical period of time allowed for reviews: 4 weeks
Note: Can be modified during the editorial process.
Although it says here that the typical period can be modified during the review process, I cannot find a way to do this - other than simply changing the date in the email to the reviewer, which causes the problem that the reply email from the reviewer will contain the original date again as well as the journal system still works with the original date throughout the whole editorial process.
Is there a better way to do this?