All writings are completely private unless the author checks the "glimpse" checkbox. If you haven't checked it, nobody can see your work.
If you do check the glimpse checkbox, then only the page you are working on shows up under the glimpses section.
Copyright and Ownership
All work is owned by the original author and One Page Per Day does not assert any claim over copyright. If the original author checks the "glimpse" button, this grants One Page Per Day the right to display the page on the glimpses section, but the author grants no other rights to One Page Per Day.
If the author wishes to remove the page from public view, he/she may simply uncheck the glimpses button.