when a bounding box is selected which keyboard shortcut scales he box proportionately

Answer 1

In many design and 3D modeling software applications, the keyboard shortcut to scale a bounding box (or objects grouped within it) proportionately is often done by holding down the Shift key while dragging one of the corner handles of the bounding box. This keystroke constrains the scaling to maintain the aspect ratio.

However, the exact shortcut may vary depending on the application you are using. Here are a few examples:

1. Adobe Photoshop/Illustrator: Hold Shift while dragging a corner handle to scale proportionately.
2. AutoCAD: Use the SCALE command, and while specifying the scale factor, you would typically not hold any additional key, but check settings for uniform scaling.
3. Blender: To scale proportionately, press S to scale, then move your mouse, and Blender automatically scales proportionately unless you specify otherwise.
4. SketchUp: Use the Scale tool and hold down the Shift key to maintain proportions.

Always check the specific software's documentation for keyboard shortcuts and commands since custom settings or different versions may change the defaults.