RollerCoaster Tycoon 3's controls differ significantly to previous entries in the series. There are no shortcuts to access any menus, or toggle views of rides, scenery, ground, people etc. The game features multiple different control schemes for controlling the camera; see Advanced Camera Controls.
Alternative camera modes are found in the in-game settings under the camera icon, with there being four cameras to choose from, Advanced, Freelook, Isometric and Normal. The Advanced camera has three alternate control layouts. Camera type 1 (not type 0) is the closest to RollerCoaster Tycoon 1/2's camera.
R
Reset camera
Advanced View - Camera Control Types
Right-click
0 Zoom and rotate
1 Move
2 Rotate and tilt
Left and right-click
0 Move
1 Rotate and tilt
2 Move
Middle-click
Rotate and tilt
Scroll wheel
0 Tilt
1 Zoom
2 Zoom
Freelook View
Right-click + drag
Rotate camera around camera position
Middle-click + drag side-to-side
Strafe camera
Middle-click + drag up / down Right and left-click + drag forward / backward