With the HTML-element you can insert HTML-widgets and code snippets on your page e.g. Google Maps.
Drag the element onto your page!
A dialogue window appears.
Switch to the website featuring the code you want and copy it with Ctrl+c, e.g. on Google Maps the code is found by clicking on 'Link' and select the code appearing below 'Paste HTML to embed in website'.
Switch back to Mashlab and insert the code in the dialogue window by pressing Ctrl+v.
Click 'APPLY', the HTML-element will now appear on your page.
Click 'APPLY', the HTML-element will now appear on your page.