How to concurrently, efficiently remove repeated instances of the same text in a PDF?

[scherz0]

This purchased PDF (that I didn't create) repeats the text, underlined in green, under each diagram. Undeniably, deleting each instance one by one is too inefficient! How can I delete this text synchronously, productively, at one fell swoop?

 

[Digerati]

You may not be able to.

Setting aside the legal and moral issues of modifying IP (intellectual property) and copyrighted materials, many pdf files cannot be edited - and that's by design. They are essentially locked by the author at the time of creation. This is to prevent plagiarism and modifications that might change meanings or introduce errors and misinformation.

If your .pdf reader does not support Find and Replace All, then you might be able to import the document into Word or another word processor that supports Find and Replace All. Then you can replace the text with a blank line or blank space character.