I don't think you can set page defaults on single_pages like you can with normal page types.

If you have something like a nav menu that needs to appear on every page, you're best off hard-coding it into the view.php template. Of course this means you can't remove it on any pages, so may or may not be appropriate for your situation.

My solution (untested) would be to have a normal C5 area in the single page view.php. Create the block(s) I wanted in one of the single pages, then put a global area referring to it in the global scrapbook and insert the scrapbook item in the corresponding area of all the single pages.

Depending on the number of single pages, inserting the scrapbook item manually may be laborious, but once there you now only have one area on one single page to maintain.

Reference the link below for more information.

http://www.concrete5.org/community/forums/customizing_c5/single-pag...