

body {
  font-size: 1.2rem;
  font-family: Arial;
  background-color: #555;
  padding-top: 20px;
  position: relative;
}

#container {
  display: flex;
  justify-content: space-around;
}

.column {
  width: 45%;
  position: relative;
}

#sourceTA {
    width: 100%;
    font-size: 1.2rem;
    font-family: Arial;
    padding: 20px;
    height: 92vh;
    background-color: #EEE;
    box-sizing: border-box;
}

#targetDiv {
  border: 1px dashed #333333;
  height: 92vh;
  overflow:scroll;
  box-sizing: border-box;
  padding: 0 20px 20px;
  background-color: white;
}


.toggle {
  position: absolute;
  top: -10px;
  right: -10px;
  font-size: .9rem;
  width: 10rem;
  padding: 8px;
  box-sizing: border-box;
}



body {
  font-size: 1.2rem;
  font-family: Arial;
  background-color: #555;
  padding-top: 30px;
  position: relative;
}

#container {
  display: flex;
  justify-content: space-around;
}

.column {
  width: 45%;
  position: relative;
}

#sourceTA {
    width: 100%;
    font-size: 1.2rem;
    font-family: Arial;
    padding: 20px;
    height: 92vh;
    background-color: #EEE;
    box-sizing: border-box;
}

#targetDiv {
  border: 1px dashed #333333;
  height: 92vh;
  overflow:scroll;
  box-sizing: border-box;
  padding: 0 20px 20px;
  background-color: white;
}


.toggle {
  position: absolute;
  top: -20px;
  right: -20px;
  font-size: .9rem;
  width: 10rem;
  height: 3rem;
  padding: 8px;
  box-sizing: border-box;
}

Set height and position of toggle buttons
Set height and position of toggle buttons
