Hello and welcome. My name is Michael.
To Reset your keyboard settings do the following:
-Make sure you press the Home button (middle button) to get out of any opened windows.
-Go into the all "APPS" white icon.
-"My Device" among other tabs should show on top of the screen, select My Device.
-Then Tab on "Language and Input"
-Under DEFAULT, it will show which keyboard type you have selected as Default and then select its "GEARS Symbol" Settings.
-Then Scroll all the way down and tab on Reset Settings.
-That should get the keyboard back to normal.
If there is anything else I can help you with, make sure to let me know.