Blender 3D
View
Fit view to object: Numpad .
Show/Hide Objects
Source
Hide selected objects: h
Hide unselected objects of the scene: Shift-h
Show hidden objects: Alt-h
Object
Set object origin point (center by default)
Source
Set “cursor” to object corner, than click “Object -> Set Origin -> Origin to 3D Cursor”.
![](https://blog.vovanr.com/pictures/Screenshot-from-2023-05-06-10-40-18.png)
Set object size (dimentions)
Open “Properties” panel (press n key).
![](https://blog.vovanr.com/pictures/Screenshot-from-2023-05-06-18-02-44.png)
Scene
Set grid size to millimeters
![](https://blog.vovanr.com/pictures/Screenshot-from-2023-05-06-10-41-12.png)
Set units to millimeters
![](https://blog.vovanr.com/pictures/Screenshot-from-2023-05-06-10-18-19.png)
Panel
Toggle “Properties” panel: n