How can I change the sort order of mail

I still dont understand... There should be a user guide...

I can not find the mail - view selections....

Here is my mailbox when i open it:

Here is when I click mailboxes, showing the inbox:

Here is when i click mailboxes, showing the list of mail boxes:

Then what I see if I open one mailbox, is the same as the picture in my previous posting.

I can simply not find the commands for Mail - View...

I can display one message... i have described the process above.

The first photo is what it looks like.

I however dont have a full screen view with the listings of mail messages and options.... there is a picture also of how the folders are shown, in the left third of the screen... i can not list these folders nor the content of one folder on the full screen... (or i dont know how to do it)

Obviously this mail app is different from the one one the mac....

When I select one message, it is displayed as as in the first picture above... only without the left hand side menu partly covering the message.

I can not at all find a menu - view type of selection ....

I don't see any columns :-(

When i select a mailbox, i see it's content in the left column of the screen

Your screenshots definitely don't look like my app... are these taken from the Mail application that comes with iPad Air 2?