If you have a device with a removable screen, rotation lock will be grayed out while the screen is connected to keyboard. This is because, in standard laptop mode, the screen will never automatically rotate. When you switch totablet modeby rotating its screen all the way back on a converti...
Try the Ctrl+Alt shortcuts if you have an older version of Windows. Older PC screens (including PCs with an older version of Windows 10) can be rotated with a combination of Ctrl, Alt, and one of the 4 arrow keys: Ctrl+Alt+↓ - Flip the screen upside down (Landscape flipped) Ctr...