About the Edit Text tool
The
tool allows you to make minor text revisions to a PDF document, including modifications to attributes, font type, size, fill color, etc.
If the related fonts are not available in your system or it is not embedded in the document then you need to confirm font substitution. See Embedding Fonts.
Make limited text edits, even over multiple lines of text. Larger modifications to PDF page content are better made using the Advanced Edit mode.