The button panel is confusing. This (below) would be better. The panel is for text-only hyperlinks. It has a list of buttons in the document, an expanded side menu, and tabs to organize the states of each button in the list. Each state could then have (potentially) separate Actions and Character Styles (or Paragraph Styles). Also please add the ability to apply <alt> and <title> properties under "Button Properties...". Do what you want with On Focus and On Blur. Please submit to your product development team. Thank you.
I will. Thanks.