Select the SMS tab in the portal, then click the "+ New Message" button.
In the 'To:' field, enter the number you would like to send a message to, and compose your message in the box below. (Note the character limit at the bottom right that updates automatically)
You can click the paperclip icon () to attach an image to your SMS message.
Click the Send icon () to send your message.
Once the message is sent, it will appear in your conversations on the left-hand side of the page
Receiving/Reading incoming messages
You can view your current SMS conversations by selecting them from the window on the left side of the page; once selected, the conversation will be highlighted in blue, and will populate on the right side of the screen:
You can use the Message box as above to reply to any incoming messages.
You may also use the Search field to locate conversations; this function can search for either the phone number of the contact, or the contents of the messages.
Contacts
By selecting the "Add to Contacts" option for a number, you can associate a name to a phone number for your SMS messages. Clicking this will take you to a new tab:
You can enter a Name and Notes to add for a phone number, press "Save Contact", and this information will be stored for your account. (Please note, this will only affect the SMS contacts, and will not have an effect on Call History, as this is managed by a different system.)
) to attach an image to your SMS message.
) to send your message.