On the CityEngine toolbar, use the Transform Scale tool (E) to scale objects. You can also click Edit > Scale Tool in the main menu. You can scale selected objects and components along the x, y, and z axes. Use the yellow handle to uniformly scale along all axes.

You can apply transform scale options, such as reference system, position and orientation, scale, or snapping in the Transform Scale tool options .
Tool options
The Transform Scale tool options include the following:
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Reference System | |
Adjust the Position and Orientation | |
Transform Individually | When multiple objects are selected, scale individual objects around their centroid with axes defined by the reference system.* |
Scale (%) | Scale objects along the axes of the reference system.
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Snapping | Turn snapping options on and off. Press Shift to temporarily turn on or off snapping. |