How to add an Icon in annotation for a portal variable?

[Snow Angel]

Hi, 

I need to add an icon in annotation of the portal variable, right after Software link, just to show that this link will open a new window.(please refer to the attachment).

<i class="icon-new-window"></i>  (provided html for icon.)

Where and how do I add ^^^ the above piece? In the source code window? Your help would be greatly appreciated. 

[Prasad Pagar]

Hi @Snow Angel 

Can you please add attachment for better clarity?

Thank you
Prasad

[Snow Angel]

Hi Prasad,

updated the attachments. Thanks for looking.