hinata precious

its automatic if you save the pic from the manga itself

go to any manga > select a chapter > click a page from within the chapter > a pop-up comes out where you can save the page you've clicked to any album you want > click save

you can then check the album in your profile to see it :3

idk for the ones where the user uploads the photo themselves tho, i havent tried that

Yes it automatically shows the link if you directly add a specific page from the manga, also if you are using your phone, you need to switch to desktop version to be able to have the "add to album" option
And if you upload a picture of your own, to add the link, you need to upload first and then afterwards click "edit" there you can see an empty space for the source, you can write the link there
Hope this helped :))