Zoom
Zoom in or out:
- A drawing or a model in the working window.
- A model sketch in sketching mode.
Do as follows:
- Press Shift while clicking the right mouse button.
- At the same time, move the mouse.- Towards yourself - zoom out.
 - Away from yourself - zoom in.
 
- Quit zooming by releasing the key and mouse button.
Wheel Mouse
Zoom by the wheel mouse:
- First move the cursor over the area you want to zoom.
- Rotate the mouse wheel as follows:- Towards yourself - zoom out.
- Away from yourself - zoom in.
 
- You can enable the Inverted Zoom setting, which changes the default functionality of the wheel mouse to opposite.- Select  > > User Preferences > User Preferences > Drawings, Models. Drawings, Models.
- Select the Usage tab.
- Select Common:  Inverted Zoom. Inverted Zoom.
 When you roll the mouse wheel: - Towards yourself - zoom in.
- Away from yourself - zoom out.
 
- Select 
Keyboard Functions
Zoom by the keyboard function:
- First move the cursor over the area you want to zoom.
- Press the button:- F6 - To zoom in.
- F7 - To zoom out.
 
Zoom a Perspective View
When you zoom with a wheel mouse in a perspective view, the program selects different zoom steps for small (dimensions are a few meters) and large (dimensions are hundreds of meters) models. This enables you to "walk" in the perspective view of a large model while being able to zoom in a small model. When you zoom with a wheel mouse in a perspective view, you can adjust the movement as follows:
- Slow down by pressing the Shift key.
- Speed up by pressing the Ctrl key.
The prompt on the status bar shows when the Shift and Ctrl keys are available.
You can set a model to a perspective projection by selecting View | Projection |  Perspective.
 Perspective.
- If the model seems to disappear in the working window, restore the whole model / drawing visible.

