To scale a 3D model in digital art, use your 3D software’s scaling tool to adjust its size along the X, Y, or Z axes—either proportionally (keeping dimensions balanced) or non-proportionally (changing specific axes).
Proportional scaling (locking the aspect ratio) prevents distortion, while non-proportional scaling lets you tweak, say, a character’s height without widening them—common for fitting props to scenes or characters to game requirements.
If you’re new, start with proportional scaling and use numerical values (e.g., 150% for 1.5x size) instead of dragging for precision; most software (like Blender’s "S" key or Maya’s Scale Tool) labels this tool clearly for easy access.