Select the camera
Press G to move it
Press R to rotate it
Press G then X, Y, or Z to constrain movement to an axis
Press R then X, Y, or Z to constrain rotation to an axis
Use N to open the sidebar and edit Location and Rotation values
Press Numpad 0 to switch to camera view
Press Shift + ` to enter fly navigation
Use middle mouse button to orbit the viewport
Use Shift + middle mouse button to pan
Use mouse wheel to zoom
Press Ctrl + Alt + Numpad 0 to align the camera to the current view
Enable Lock Camera to View in the sidebar to move the camera while navigating the viewport