Revaluating an Asset in Multiple Books
For multi-book enabled accounts, the Accounting Book field is added to the asset revaluation page. This lets you select which accounting books (associated to the asset) you want to revalue. A Calculate button is also added on the page to compute the write-down amount and to enable the revaluation fields for the selected accounting books.
To revalue an asset, follow the procedure in Revaluation of an Asset.