This program is uncomfortable in tablet pc. How can I use Adobe Reader instead?

My English  can be immature.

Please understand.

This program need to press pagedown button to turn a page.

But, in tablet pc, It dosn't have any button to turn a page.

It only has a touch screen.

Another method to turn a page  is scroll bar.

However, it's uncomfortable too.

If  using adobe reader is available or any other method is available, could you introduce me?

Thanks for reading and interest.