Crossing the border from Myawaddy Myanmar to Mae Sot Thailand is very easy and straightforward.
On the Myanmar side, the exit office is on the left side of the road. There are no signs on the sliding glass windows but they can be opened to get the attention of the border agents.
After getting the exit stamp there is final check and then it is possible to walk across the bridge which is only about 500 meters.
On the Thai side there are different lines depending on nationality. There are separate lines for Myanmar and Chinese citizens. Window 14 is for all other foreign passports.