ðeɪ kæn biː ˈædᵻd ˌʌndɚ ðə kˈʌstəm ˌænɪmˈeɪʃən fˈʌŋkʃən ɔːɹ θɹuː ðə jˈuːs ʌv vˈɪʒuːəl bˈeɪsɪk fɔːɹ ˌæplɪkˈeɪʃənz vˌiːbˌiːˈeɪ.
They can be added under the Custom Animation function or through the use of Visual Basic for Applications (VBA).