Is there a comprehensive guide to sexing chicks?

[Lil'ChickFarm]

I have seen bits and pieces on here.
Big feet and legs
Bigger combs
Earlier feathers means female
Scruffing chicken to see if their legs hang or curl up.

If there a comprehensive guide somewhere to help sex chicks?

I often see people showing a photo and people say, "yup, that's a roo". How can they tell?
Thanks for your help.

 

[John Chicken GB]

I'm in the same boat , is there no vent check , to sex a chick ?

 

[Farmer_Dan]

Here's the most definitive guide I've found, and suggested to many people.

https://www.backyardchickens.com/forum/viewforum.php?id=15