magnify option not showing in photo editing

Write or draw on a photo

1. In Photos, tap a photo to view it in full screen.
2. Tap Edit, then tap .
3. Annotate the photo using the different drawing tools and colors. Tap  to magnify or add a caption, text, shapes, or even your signature.
4. Tap Done to save your edits, or if you don’t like your changes, tap Cancel.

in this article number 3 ( Annotate the photo using the different drawing tools and colors. Tap  to magnify or add a caption, text, shapes, or even your signature.)magnify option not showing