Adjust software and hardware keyboard settings on iPod touch
If you have difficulty distinguishing characters on the iPod touch keyboard or manipulating a hardware keyboard, you can adjust settings such as the key repeat rate.
Tip: Rotate iPod touch to use a larger keyboard for typing in many apps, including Mail, Safari, Messages, Notes, and Contacts.
Change the keyboard settings for accessibility
Go to Settings > Accessibility > Keyboards.
Do any of the following:
Show only uppercase keys on the iPod touch keyboard.
Adjust the key repeat rate on hardware keyboards.
Use Sticky Keys to press and hold modifier keys, such as Command and Option, as you press another key.
Use Slow Keys to adjust the time between when a key is pressed and when it’s activated.