Unfortunately I could not find anything helpful with my google skills. Coming from wordpress I am quite new to TYPO3 and I am a little overwhelmed with it.
I would like to adjust the RTE only in my TYPO3-extension. It should allow iframes and images.
Can anyone help me how to do this in the best way?
Images in the textarea would void the clean separation of images and text, but there is an extension rte_ckeditor_image which would enables it.
Otherwise you could define configuration presets, which you could assign to your fields.
More info in the manual for the rte_ckeditor