Basically Windows Mobile is not touch optimised. Especially scrolling through explorer, e-mail etc.

Fortunately HTC has done some tweaking to UI so that we can touch anywhere in the screen and scroll, instead of touching the Scrollbars.

Unfortunately some application don't support this feature and again you have to use your stylus to scroll.

But there is a solution. By making some changes in registry entries we can make the scroll bar wider and use it without the stylus.

Instead of making registry changes I used a tweaking application specific for Diamond called as "Advanced Configuration Tool" v3.3 with which we can do lot of changes.

You can find the free tweaking application here and a  discussion about it going here

The following screen shot shows the tweaks.

Launch Advanced Config > User Interface > Change the values in Horizontal scroll bar height appropriately > Do a soft reset(restart the device) and you can see the result.

Launch Advanced Config > User Interface > Change the values in Vertical scroll bar width appropriately > Do a soft reset(restart the device) and you can see the result.

I find 22px appropriate for my finger size.

Note: In my screen shots the scroll bars are already wider because the tweak was already applied.

Happy Scrolling