I may be wrong, but... I think you just touch/tap on the screen where you want the camera to focus.

 

Its all good.. you can leave it in auto focus mode and do this as well. This method works in auto or manual mode.

 

it still would be nice to have manual control, i've had the tap to focus go wacky on close ups of smaller things

 

Another tip, if you want to take better clearer pictures, avoid the shutter button, simply just hold onto the area of focus, and it'll refocus again but much better and then takes a picture.

 

There's no way of manualy focusing the camera.
Tapping for focus is assisted auto focus

 

well, you can turn off autofocus in the settings
then press/hold focus...but as for fine tune focus, no there is no way.

 

From where In the settings

 

Hello!
Perhaps the settings from within the camera app itself?
Not sure what android version the Evo was on when this thread was started, and may or may not be present depending on what version you are on.
If that doesn't work, perhaps a different camera app can allow manual focus.