Time for action — moving an object in one plane in the local mode
We talked about global and local axes. Now you see the difference in action. You tap once to specify moving along a global axis, you tap twice to specify moving along a local axis:
With the camera selected, press the G key to grab it.
Now tap the Z key two times and move the mouse.
Now tap the X key twice and move the mouse.
Now tap the Y key twice and move the mouse.
Press theLMB to let go of the camera.
What just happened?
You discovered that when you press the G key you can restrict the motion to the global Z plane by pressing the Z key once. If you press the Z key two times in a row, motion is restricted to the local Z plane. The same applies to the X plane and the Y plane.
Have a go hero — controlling location with numbers
Not only can you control whether you move, rotate, and scale an object, and along which axis with keys, but you can tell Blender what values to do it by. Try it.
Select the cube. Press the G key, then the Y...