How do i disable the text in the upper right of the screen

To disable the split screen go to the Home screen and tap on Apps. Tap Settings. Tap on Multi Window. Tap the Multi Window Switch ( located in the upper right) to enable it disable.

Step 1
Swipe the Status bar at the top of the screen towards the bottom of the screen to display the Quick Settings menu, and then tap "More." To open the Quick Settings menu in Explore by Touch mode, use two fingers to swipe down the Status bar.
Step 2
Tap "Accessibility" to view all settings related to accessibility. Locate the Text-to-Speech and Voice Guide options in the menu.
Step 3
Turn off the "Text-to-Speech" and "Voice Guide" options to disable the voice capabilities of your Kindle Fire HD.

Here Samsung Galaxy Tab 4 10 1 16GB White Samsung Mobile

It should not rotate if the position is locked. To lock the screen, pull down the upper menu by either touching the screen on the upper right or (if it's an HDX) sweeping down from the top. On the left is an icon, the lock screen icon. Tap it until it reads "locked". If this does not work there may be a malfunction which requires a repair.

Go to Settings, then Safari, select Passwords & Autofill, select Saved Passwords, tap Edit in the upper right corner, then check the box next to both https://www.facebook.com and https://m.facebook.com, then tap Delete in the upper left corner. This will disable automatic fill-in of the username/password fields when logging in to Facebook using Safari.

Settings > General > Accessibility > Voice Over > Off

This is in the Vision section and is intended to assist the visually impaired.

Assuming you are talking about Amazon's Kindle Fire:

Go to the main screen, pull down from the top, in the upper right hand side there is settings, then go to Accessibility, about half way down there is a switch for "Use Large Font Size". That increases the size throughout the whole system.

Or if you are asking about while you are reading an eBook? While in the eBook click the screen to bring out the settings menu, There is a button that says: "Aa - View" Click that, then you can click the Aa with an arrow above it and it will increase the text size for your book (You can also choose a different font which may be easier for you to read too)

Go into system to Language and input.
Click on the UNTICKED Google Keyboard English-box at right of page.
If its like my mark 1 Hudl or my wifes Hudl it then shows a Language screen.
Go back and double click the above and go down to text correction where you can either switch off or adjust the sensitivity of the predictions.
Once you have done this a single screen click shows you this "missing"screen.
If you totally dislike the Google keyboard then go into language screen and choose Qwerty keyboard.

Press the Up + Down buttons at the same time. This will turn off the "Digitizer" function on the tablet and allow the user to use their finger, the stylus, or blunt end of a pen.