You can use a link button, with an empty caption and choose an icon. This will display the icon you choose and when a user clicks the icon, it will open a new browser tab or window to the link that you configured.
Hope this helps!
If I have a lot of pages that need to have help link button, I want to maintain a look up table. Table will save each button's id and each associated help URL link. But my question is: does each link button has unique id on each page?
The way you told me worked great. What I am doing now, is use pageId and urlLink in a table.
Then in the microflow I can retrieve the urlLink by the pageId. The only issue is for each different page I have to manually set the pageId.
Is there a way to use the microflow as a common function where I can just pass in the pageId as a parameter?