FA: How to Create Budget Asset ?

Hi,

According to the R12 Asset User Guide:

You can create an asset in the budget book for each budget amount, category, and general ledger depreciation expense account you enter. The budget asset is placed in service in the period for which you specified the budget amount. The budget book depreciation calendar must be the same as the associated corporate book and can have up to twelve periods.

However, no matter I go to Asset Workbench or WebADI for asset addition, I can't select the Budget Book (I have already created on in Book Control). So how can I create budget asset as mentioned in user guide?