Is there a way to remove red nodes in every glyphs at once?

Hi.
I’m doing convert TTF to OTF my typography works.
But I’ve some glyph including red node as you can see in my screenshot.
My works include about 10,000 glyphs in there, so I want to remove so many red nodes in my typo at once time. Is there a way to remove red nodes at once? (I know that what is red node mean.)

Yes, use Path > Tidy up Paths (Shift-Command-T). There’s some info in the Drawing Good Paths tutorial.

In Font View, select all your glyphs with Edit > Select All (Command-A) and then use the Tidy up Paths command.