After starting a new signing, you can, during the first step in the process, decide if you want to send reminders to your recipients by email or text message.
You will find this option by clicking Show advanced settings. From here you will have the following options regarding the frequency of the reminders:
Specify how often reminders are to be sent, for example every seventh or fourteenth day. You can also specify when the last reminder will be sent. For example, one day before the signing expires.
Alternatively to a fixed interval, you can choose specific dates for sending out reminders. You can enter as many dates you want before signing expires.