How to create statis baseline start and finish date columns that won't change

Member for

12 years 6 months

The standard practice is to save baseline after your schedule is perfect, before puting any actual.

Then u can update actuals and monitor the difference between plan v/s actual.

After the completion of project upto some %ge, u fill that there are noticable changes, which need to be edited in plan itself (like addition of scope or like modification / revision / rework), than you can copy paste actuals as baseline2 with neccessory additions.

Save baseline2 and than again start putting actuals. Monitor plan v/s actuals again...