
Do you really have to be a member? I don't think you do, but don't take my word for it; I'm not sure. Go to the manga you want to read, click the orange "Start Reading" button, and when you are shown the first page of the manga, there should be several options at the top of the page (where it gives you the page and chapter number and bookmark option):
On the far left is the chapter number, and beside it, it will say "Add to album." And beside that, it'll say "Multi pages" - check the little box by clicking it and what that does is allow you to read the whole chapter in one giant long page just by scrolling down. It's convenient if you don't want to keep clicking to go to the next page.

just last week i experienced the multi-page feature disabling itself again and i have to click to death each page. i tried to refresh but it's still there. i just shrugged and continue on reading. i noticed that it happens when i am reading webtoons (the multi-pages doesn't disappear on every webtoon i read but IDK if it's just coincidence but the multi-page acting up on me when i happen to read webtoons only)
anyway, i let it be and i didn't remember when i closed my browser but when i turned on my internet and opened mangago, my multi-page is back again, provided i recheck the thing once more. and until today, im still automatically in multi-page mode whenever i log in.

Does it have something to do with how recent they were added maybe? Because I tried reading a chapter yesterday, where the multipage option did not appear, although it did on the chapter before it, and today it was working again...
It is kind of annoying, especially because the pages for me seem to skip every other page, so multipages is the only way for me to read TT_TT
How can I use multiple pages? (●'◡'●)ノ
Someone please tell me.