7.5.3 Adding IDF Curve

It is necessary to add a new IDF curve if the desired return period doesn’t present in the IDF group. To add a IDF Curve, first select the IDF Group that you want to add a IDF Curve to in the Library Explorer, and then click the IDF curve button in the Toolbar or choose the Add New IDF Curve menu in the IDF Group context menu. The return period of the new IDF curve is 0 and needs to be edited later.