formatVertical.js

function onOpen() {
  var ui = SpreadsheetApp.getUi();
  // Or DocumentApp or FormApp.
  ui.createMenu('Extra Format')
      .addItem('Horizontal', 'formatHorizontal')
      .addItem('Vertical', 'formatVertical')
      .addToUi();
}
function formatHorizontal() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = SpreadsheetApp.getActiveSheet();
  var cellRange = sheet.getActiveSelection();
  var numRows = cellRange.getNumRows();
  var numCols = cellRange.getNumColumns();
  
  for (var i = 1; i <= numRows; i++) {
    for (var j = 1; j <= numCols; j++) {
      var cell = cellRange.getCell(i,j);
      var cellValue = cell.getValue();
      var newValue = "";
      
       for (var c = 0; c < cellValue.length; c++) {
         Logger.log("index: " + c + " " + cellValue[c]);
         var char = cellValue[c];
         var newChar = char.replace("\n","");
         newValue += newChar; 
        
      } //end iterating thru letters in word
      
      cell.setValue(newValue);
    } //end for numColumns
  } //end for numRows
}
function formatVertical() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = SpreadsheetApp.getActiveSheet();
  var cellRange = sheet.getActiveSelection();
  var numRows = cellRange.getNumRows();
  var numCols = cellRange.getNumColumns();
  
  for (var i = 1; i <= numRows; i++) {
    for (var j = 1; j <= numCols; j++) {
      var cell = cellRange.getCell(i,j);
      var cellValue = cell.getValue();
      var newValue = "";
      
      for (var c = 0; c < cellValue.length; c++) {
        //Logger.log(cellValue[c]);
        if (c == cellValue.length - 1) {
          newValue += cellValue[c];
        } else {
          newValue += cellValue[c]+"\n"
        }
      } //end iterating thru letters in word
      
      cell.setValue(newValue);
    } //end for numColumns
  } //end for numRows
} 

onOpen();