[Update help topic] reading mail

[Update help topic] reading mail

Dear zoho contributor,

I am a new user of Zoho service.

When I go through the help topic, I found that there are some pics need to be updated.

For example, on  https://www.zoho.com/mail/help/reading-mail.html

Step 8,9 now changed to using the bottom right button.

Although it is a very minor fix, it will help new user to adopt the interface more easily.

Thank you,
Marco