How to add message/read-only text field to Edit screen

[Rafal Sojka]

Hi,

I would like to add short information/message on an Edit screen to inform my users about something but I do not want to use JIRA Toolkit plugin.

The plugin seems to be quite old and last update time was almost 1.5 year ago. Do you know why JIRA Toolkit is not supported by Atlassian ? Does it contain some bugs or caused some issues in the past ? 

If you know any alternative solutions for my problem, I will be more than grateful if you could lift the veil of secrecy :).

Thank you,
Rafal