How to identify empty space

"Copy" the frame and "Paste in place"
"Fit frame to content" in "Adjust size"
Looking at the difference between the original frame and the geometric bounds may help you understand the meaning of the space.

Hi @SA8888 ,

you need to write your own solution.

What I can think of is to export the page to PDF and render it with PhotoShop to do a selection with all pixels on the page. With that you can determine empty spaces.

Regards,
Uwe Laubender
( Adobe Community Expert )

Hi @SA8888 ,

empty space in regards to the page the text frame is positioned?

Or empty space in regards of the text the text frame contains?

Regards,
Uwe Laubender
( Adobe Community Expert )

Work always with Object Styles, so you can temporarely add area or stroke color.

But if you did not work with dedicated Object Styles, you can change the stroke and area to all given default styles in [] to show them temporarel.

Does anyone with a suggestion or is this possible to identify?