Views:
  1. From the preset detail view, tap the preset options icon in the tab bar below

     
  2. The preset options view will have the option to Rename, tap it to continue

     
  3. Tap on the text field to pop up the keyboard and make your edits
  4. The circular X icon button will clear the field
  5. When you are done editing the name of the preset, tap the Save button in the upper right to save your change