Membership Pro subscription form - text above the form?

Hello,
The registration/subscription form on our site has an H1 heading, followed by text that describes the plan.
In the past, we have been able to edit the H1 heading and the text.
I want to change this text, but I cannot find the form inside the Membership Pro Dashboard area.
Questions: 
Where are the forms for editing the  H1 heading and plan description within Membership Pro?
Also, is it possible for us to add images or other HTML to the text area?  If so, how can we do that (without custom coding)?
Many thanks for your assistance.

Hello

1. For the text inside the h1 tag, go to Membership Pro -> Translation, find the text and change it from there

2. For the message above form, please go to Membership Pro -> Emails & Messages, you should see the message and can change it to meet your need

Regards,

Tuan