Save the file, uploading it to your website if necessary. When visitors view the file and click the print button, a new window will open that contains the print-optimized HTML file you created.

Calculators that add numbers require four basic controls: two text boxes to enter numbers, a text box to display results and a button. The following HTML code creates those four controls: ...

The panic button hasn’t yet graduated to a full, native feature—you need to enable the Early Bird mode in the browser. Click the Easy setup icon (the sliders icon, top right), then Enable in ...