Copying comments in Google spreadsheet into a column

Will copy every comment on a cell in a column into a cell next to the source column (the one with the comments):

function commentsToColumn() {

  // find selection (the source comments)

  var workbook = SpreadsheetApp.getActiveSpreadsheet();

  var sheet = workbook.getActiveSheet();

  var source = sheet.getActiveSelection();

  // determine target (the column to the left of the selection)

  var target = source.offset(0, +1);

  // copy comments

  comments = source.getComments();

  target.setValues(comments);

}

If you need more info for usage, please ask in comments :).