How to do the revaluation on Net book value
The revalued amounts of fixed assets are presented in financial statements either
1)by restating both the gross book value and accumulated depreciation so as to give a net book value equal to the net revalued amount or
2)by restating the net book value by adding therein the net increase on account of revaluation.
So there is two options.First options achieved by checking Revalue accumulated depreciation check box.
How to achive the second option in Fixed Assets