Question

write a short note on find and replace option

Answer 1

Finding and replacing text can be helpful when editing notes. OneNote doesn't have a find-and-replace feature, but you can use the search box to find a keyword. If you'd like to replace instances of a word or phrase, you can replace them one by one.
You can use the search feature in OneNote Online, to find specific text on a page, and then replace it with different text by using a keyboard shortcut.