How to Edit a PSD Document in LibreOffice?

I am new to LO & have a basic question. I downloaded a template in a psd format which is completely editable. However, I cannot figure out how to edit the text. Double-clicking seems to do nothing other than enabling me to reposition the text. Can you please help? Thank you.

I think it is not possible to edit Photoshop file using LibreOffice. You will need Photoshop (Windows or Mac OS) or Gimp.