Answer:
i. The POST MESSAGE button can be used to publish.
ii. Click on EDIT button to change a message.
Step-by-step explanation:
The message board is an online discussion inter-phase where people can hold conversations in the form of posted messages. In the internet forum, users with similar interests discuss topics, leave a reply or read a message.
After typing your message, you could publish or post it by pressing the POST MESSAGE button on the inter-phase. This operation makes it available to other users to read or react to it.
To edit or change a message, select the message and click on EDIT button and post it so that the changes can be viewed by other user's.