I created a little image gallery management plugin.
I can insert my own plugin to a page, but I miss some point.
When I insert a plugin in a page, I want to show info there to be easier to track all items added.
This is the page where I want to show previews:

Under CODE: section, I am sure I can put content, but don’t know which is the method or config to do that.
I will appreciate any hint regarding this.
UPDATE: I am using FlexForms, and not TypoScript nor things like that. What I am looking for is some Hook or some special configurable method to execute a PHP function to output things there.
Thanks
See http://buzz.typo3.org/people/steffen-kamper/article/render-custom-preview-from-extension for a tutorial how to create your own plugin preview in the typo3 page view.