FYI
If you want to add the datasheet to your custom component, double click the component and add under
Parameters a paramater with the name
HelpURL, the value is the http(s) link to your datasheet.
Now, when you hold your mouse cursor over the component and press F1, ta-da the datasheet loads. Or right click the component and you should see
References menu.
Have a look:
http://techdocs.altium.com/display/ADRR/Sch_Obj-Parameter((Parameter))_ADThe
ComponentLink1Description &
ComponentLink1URL also works (shows a Reference menu when right clicking the component).