How come I can only see 62 threads in this forum?

I see this page:

https://www.opengl.org/discussion_boards/forumdisplay.php/3-OpenGL-Developers-Forum

says there are like 33,000 threads in this beginners sub forum. But how come when I navigate to it:

https://www.opengl.org/discussion_boards/forumdisplay.php/6-OpenGL-coding-beginners

I only see 3 pages, and only 62 threads?

On the top bar, Forum Actions, then General Settings, scroll down to the section headed “Thread Display Options” and change the setting for “Default Thread Age Cut Off”.

Ah, I see, thanks!