Content editor does not use a pre-existing snap-to grid, and all objects can be moved freely. The grid goes to all three dimensions but is visible on only 2 dimensions at the “table level”, the level where the Object shadows are also visible.
Moving Object in one dimension: Grab the Object by one of the three dimensional arrows, and move.
Moving Object in two dimensions: Grab the Object by one of the three squares, and move.
Once selected, Object(s) can be resized with the RESIZE tool (R). You can resize objects in one or three dimensions at a time.
Resize
Shortcut: R
Adjust the size/scale of the selected object(s)
TIP: You can hold Shift for scaling in steps.
Resizing Object in one dimension
Grab the Object by one of the three axis lines and resize it by moving the mouse.
Resizing Object in three dimensions
Grab the Object by the centre square and resize it by moving the mouse.
Once selected, Object(s) can be rotated with the ROTATE tool (E). You can rotate objects in one or more dimensions at a time.
Rotating Objects along an axis
With the Object(s) selected grab one of the three axis circles and move the mouse to rotate around that axis.
TIP: You can hold Shift for rotating in steps.
Rotating Objects relative to the camera view
With the Object(s) selected grab the outer circle around the X, Y and Z axis circles and move the mouse to rotate around the camera view axis.
TIP: You can hold Shift for rotating in steps.
You can reset the axis for rotation with the X-button. This is especially useful when you've rotated an object and want to reset the axis point.
You can reset the rotation and scale with the C-button (or with the "Reset rotation and scale button" in the top menu bar).