Step 2: Insert option buttons Option buttons will be used to select the type of conversion to perform, i.e., Celsius to Fahrenheit or Fahrenheit to Celsius Click Insert within the Developerribbon and select Option Button under Form Controls. Cursor changes to a thin cross. Click anywhere on the worksheet to display the option button. Right-click the option button to select it and reveal options to edit it. Select Edit Text, and write Fahrenheit to Celsius to replace the default text You can either select the option button, copy it and paste to create a second option button, or just create another using the previous steps. Change its text to Celsius to Fahrenheit Select the two option buttons and use their handles to move them to occupy the merged cells B3 & C3. Arrange them side by side to give a nice look