I got my raspberry Pi a case which protects it well and to fix it all together you have to put the screen in a specific position so it all fits in and I don't know how to invert the display so I can use the case to its maximum potential, can anyone help me plz?
Put "lcd_rotate=2" in /boot/config.txt and the screen will turn upside-down.
When the original software, cases and everything else was designed for the screen, no one noticed they'd got it the wrong way up. (oops!)
A software fix was put in place to flip it the other way, but some cases had already been designed for it. So the "lcd_rotate=2" option was added to flip the image and touchscreen "upside-down" so it works in those cases.
The GL driver in Stretch is not compatible with "lcd_rotate = 2" and you must disable it.
It works with the official Raspberry Pi Foundation 7" display.