When You install gmail app from m.google.com. the app has an annoying keypad at the lower half of the screen.
Now you can remove that keypad by performing the following steps:
1) Go to Settings> Application Manager>Installed app.
2) then select gmail. go to options> suite settings .
3) turn off the on screen keyboard.then you are done..
4)Now we can increase the font size for easier use of touch. open the gmail app. Menu> go to > settings and check the following option: use large fonts.