I know, this question sounds ridiculous, but the answer is not so obvious.
On 99% of websites it's easy: Bookmark, or right-click and "copy Link". Boom, Done!
In the new(ish) ABAP Doco pages it's all scripted. I can manually craft a URL and paste the header in, but this is 2016 and stuff should be easy.
I start off at the main help page: ABAP Keyword Documentation
I navigate to Reference > Syntax > Statements. I want to copy the "expressions" link on that page.
Attempt 2: Click to follow link, wait for page to load. Bookmark / share page still has my start page in the page URL "http://help.sap.com/abapdocu_740/en/index.htm". Also no good.
(Or if you started out from another link, e.g. from Horst's example above, and follow a few links, it will still have your original starting point).
Attempt 3: Right-click in a frame, "open in new tab" and bookmark that. Has the correct link, but I still need to copy/paste the header. Not a big job I know, but like I said: it's 2016 and this worked nicely in the old SAP Help.
This is on Safari and Firefox on a mac and FF on Windows.