How can I reduce the size of a PDF by deleting some pages in desktop editors?

I can’t reduce the size of a PDF by deleting some pages in desktop editors. How can I reduce the size of a PDF by deleting some pages in desktop editors?

Hello @nishigaki
Edit PDF > Page Thumbnails. Here you can delete some pages

Sorry, that was a poor explanation. I deleted pages but the file size didn’t get smaller.

Hello @nishigaki

Thank you for clarification. We will check the situation with pages and I will provide a feedback.

Hello again @nishigaki

I was informed that this issue has been registered as a bug.
Sorry for the inconvenience. We are already working on the solution.