• Bookmark of sorts
• Bookmark, perhaps
• Corner fold
• Ersatz bookmark
• Folded corner
• Folded-over page corner
• Impromptu bookmark
• Indication of a bookmark
• Informal bookmark
• Kind of bookmark
• Makeshift bookmark
• Mark a page, in a way
• Mark by folding
• Mark with a fold
• Place marker
• Place marker of a kind
• Place marker, of a sort
• Place saver
• Place-marker's ploy
• Reader's place marker
• Reminder of where to return to
• Sign of a page-turner?
• Simple bookmark
• Turn a certain corner
• Turn of the page?
• Turndown?
• Turned-down corner
• Turned-down page