I configured my hex router after removing default configuration. I'm new to Mikrotik and learning my way here. I setup the router with At&t gateway and everything works. For some reason when I look at the interface screen, it looks something is not done correctly.
In my case, ether1 is WAN port. Do I have it right?
My router is a Mikrotik hEX RB750Gr3 5-port Ethernet Gigabit Router.

The interfaces looks fine, something not working?
By the looks of it you have a bridge with slave (S) intefaces ether2-5 and ether1 is not in the bridge so can be configured as WAN port.

But with only this screenshot nobody can tell if you configured the router correctly. The default config is actually pretty clean and works fine most cases - Can learn a lot from it and continue from there.

What version of ROS are you using? Are all ports set as master to Ether1? Ether2 shows as slave so I think you are using the RC version with the new switch/bridge implementation or else using as a switch. Give us more information.

For some reason when I look at the interface screen, it looks something is not done correctly.

Like what reason? You're new to this and you think something's wrong, but you don't say what or why.

Do I have it right?

Who knows? Post config. exports and somebody might tell you. Post pointless screenshots and nobody can.

Which ethernet ports ni the bridge? Other things seems fine.

It's working fine.
But if I want ethher1 to be WAN and other 4 to be just switch, how do I go about it?

It's working fine.
But if I want ethher1 to be WAN and other 4 to be just switch, how do I go about it?

Because we don't know ANYTHING about your config, the only proper answer is below.

Make sure you have latest firmware installed, open WinBox, and then:
System > Reset Configuration
Make sure nothing is checked and confirm Reset Configuration. Once router is rebooted, you will have default configuration with ether1 as gateway and ether2-5 as bridged LAN.