I know this very dumb question in Ask Ubuntu. I want to know how in this link the key symbols are attached in question and in this link (in answer section 2 question) how Ubuntu software center open directly from clicking on link. I tried in formatting help but not found anything.
https://askubuntu.com/editing-help will help you out.
<kbd>Your Key Here</kbd> for Your Key Here. To link to the Software Center, use