I
Iframe Syntax <iframe src="URL"></iframe>
<iframe src="demo_iframe.htm" height="200" width="300"></iframe> Use the height and width attributes to specify the size of the iframe.
The attribute values are specified in pixels by default, but they can also be in percent (like "80%").
Iframe - Remove the Border <iframe src="demo_iframe.htm" style="border:none;"></iframe> By default, an iframe has a border around it.
To remove the border, add the style attribute and use the CSS border property
<iframe src="demo_iframe.htm" style="border:2px solid grey;"></iframe> With CSS, you can also change the size, style and color of the iframe's border
iframe Attributes
align left  (Not supported in HTML5.)
right
top
middle
bottom
height pixels
width pixels
src URL
srcdoc HTML_code   (HTML5. Specifies the HTML content of thepage to show in the <iframe>
scolling yes   (Not supported in HTML5.)
no   (Specifies whether or not to display scrollbars in an <iframe>
auto
<iframe> supports the Global Attributes in HTML
<iframe> supports the Event Attributes in HTML