Blank spaces/fields in the PDF generated using InDesign. How to eliminate them?

[Arun5CED]

While selecting the content in PDF a lot of blank spaces/fields gets selected too. How to eliminate them, image above should give a better understanding.

[Steve Werner]

What PDF reader are you using? Please tell us what operating system (exactly) you're running. 

[Arun5CED]

Thank you for the reply Steve Werner. I'm using adobe acrobat reader DC as a PDF reader and my OS is Windows 10.

[Steve Werner]

What's the purpose of deleting the spaces? PDFs are generally just used for reading. How they created doesn't usually matter.

You would need Adobe Acrobat to do editing on a PDF.

[Brad @ Roaring Mouse]

Why are you trying to copy content from the PDF after the fact? The ability to copy content that way from a PDF is shaky at best since that's not the point of a PDF anyway. Regardless, the InDesign file could be incoporating objects that you can't see... e,g. imported spaces and tabs from a database, hidden copy, etc. Without seeing the PDF, I can't speculate further. One thing you could do is open a sample page of the PDF in Illustrator... that may show you where/what is causing the spaces.