Adding handwriting lines to an inserted blank pdf document.

Sir

When pdf files are accessed from western digital hard drives, accessed from the FILES app in iPadOS, you can notice that at the top  right corner there is an icon that when pressed, a selection of pens and rubbers come up on bottom of screen. This enables handwriting with stylus. Also, on the left hand side of the pdf screen, one finds a column of the pdf pages listed orderly one on top of another. When pressing on a page in this mentioned column, the option to insert a blank page comes up in the selection.

All this can be seen clearly from the attached screenshot.

Can you please insert handwritting lines in order so that I can align my work neatly.

'Certainly you would be giving us a complete service.

Thanks very much

Mario Filletti.

'Malta.