The method of rotating pictures in iapp software depends on the specific application you use. However, in most applications, you can rotate the picture by the following steps: 1. Open iapp software and select the picture to edit. 2. Look for the rotation icon in the edit menu or toolbar. 3. Click the rotation icon, and you can choose to rotate the picture 90 degrees to the left or right or 180 degrees, or make other rotation options. 4. Confirm your choice and save your edits.