Open Edit PDF text and choose your PDF. The editor opens with big coloured buttons at the top: Edit text, Add text, Picture, Sign, Highlight, Erase, Draw, Shapes, More.
Tap Edit text, then tap the line you want to change. A box appears around it.
Type your change. Urdu and English both work. When finished tap Done; the panel closes so the whole page stays visible.
Tap Add text, then tap an empty place on the page and type. Use the panel to change Font, Size, Color and B / I / U.
Made a mistake? Tap ↶ at the top to undo (↷ to redo). Nothing changes your original file until you download.
When finished, tap ⬇ Download at the top to save the edited PDF.