Accidently pressed a button and it automatically resized the screen. I cannot get the screen back to its normal size as it wont let me re-adjust the screen manually. Any advice on how to fix this?

Screen size depends on the broadcast signals aspect ratio, the TV adjusts for that automatically, the picture can have no bands or be banded top and bottom or on both sides.

I don't know much about Windows 8.1 on tablets, but if you can find the Ease of Access menu you can run the Magnifier application and set it to lens view so when you scroll to the edge of the screen it will scroll the whole dimensions of the resolution and not just to the edge of the screen size itself. That might help with selecting with what is off the edge of the screen.

My explanation isn't prefect, neither is my grammar. If you run the Magnifier app you'll see what I mean though, it should work.

Click/Tap (Start > [Type] ease of access) the option is there.

Hope that helps

It sounds like your input signal is in 4:3 and the projector is in 16:9.
You need to adjust the "Resize" mode.
On your remote, press the "Resize" button (bottom-right of the remote, looks like a screen with two arrows pointing left and right [< >]) until it is in "Normal" mode. If that does not work, try setting it to "Border".

You can adjust the font size by holding the CTRL button + mouse scroll to adjust it back to normal size.

take pritner to factory defaults .
press cancell and power button at same time.
you will see message on screen enter special key combo. then press blue green and gray button in a sequesnce. it will show you support on screen. press blue button 2 times it will show reset menu. press ok on it. then press blue button 2 times it will show semifull reset press ok.

just move the mouse over the picture in the corner and hold down left mouse button and drag the corner inwards and picture will resize.

You can resize windows without the mouse.
If the windows is maximized: press and hold the ALT key and then press the SPACE BAR.
Now press the R key. This will restore the window to a non-maximized state.

To resize: press and hold the ALT key, and then press the SPACE BAR.
Now press the S key to size the window.
Next, use the cursor keys to resize the window to your liking and press Enter when done.

Jules

right click on the desktop, and select "properties" then adjust your screen resolution

just right click right in desktop and choice properties then setting and adjust the screen resolustion

reinstall the driver for your monitor or adjust the resolution in the desktop properties