Is it considered plagiarism if you give credit to the editor?

It depends on the circumstances and the extent to which you have used the editor's work. If you have simply copied and pasted large sections of the editor's work without adding your own original commentary or analysis, then this could be considered plagiarism even if you have credited the editor. However, if you have used the editor's work as a source of information and have integrated it into your own original writing, then this is generally not considered plagiarism as long as you have properly cited the editor's work. Ultimately, it is important to always give credit to the original author or editor of any work that you use in your own writing, and to be transparent about the extent to which you have used their work.