4.3. Moving around the project – viewing and scale<br>

## 4.3. Moving around the project – viewing and scale

A project can be created and edited in any scale. With large projects, the scale required to display the entire project on the screen will not allow precise editing or component selection. For that reason the program is equipped with many advanced functions which enable zooming in and out and panning fragments of the installation.

The current scale of the installation is shown in the upper left corner of the drawing area, between the vertical and horizontal rulers: . Upon clicking this button, a menu appears where you can select the editing scale:

Selecting the viewing scale from the list is not very convenient. It is easier to use the following buttons in the “Functions” tab to zoom in or zoom out:

– Zoom in (magnify) in steps (Ctrl+“+”). The magnification step is configurable (see section 7.3.1),

– Zoom in selected area (Ctrl+“*”). Upon clicking this button you mark the area to be zoomed in. The eventual viewing scale depends on the size of the area marked: if the marked area is large, the viewing scale is increased only slightly, if the marked area is small, it will be displayed in large scale.

– Realtime zoom in/out – stepless zooming (Ctrl+„/”). The area around the point indicated by the mouse pointer is magnified or contracted – the advantage is that you don’t have to look for the location you want to edit. Realtime zoom is assigned by default to mouse roll.

– Zoom out (reduce) in steps (Ctrl+“-”).

– View entire project (F5): the viewing scale and area are changed so that the entire project is displayed.

– View entire active layer (Shift+F5): the viewing scale and area are changed so that all components of the active layer are displayed. For instance only the installation can be magnified in this way, no matter components set on the different layers.

– Revert to recent magnification and location – restores the scale used and location displayed before the last zoom or move operation.

¨ To use the realtime zoom function:

1. Switch the realtime zoom mode on.

2. Position the mouse pointer on the part of the drawing you want to zoom in or out.

3. Press and hold the left mouse button.

4. While keeping the left mouse button depressed move the mouse upwards to zoom in on the fragment or downwards to zoom out the fragment.

Stepless changing of the viewing scale (realtime zoom) provides a convenient way of observing individual fragments of the project in association with the “View entire project” function. After having edited a fragment of the drawing you press the F5 key and use the realtime zoom to magnify another area of the drawing you want to edit.

The functions described above are used to change the viewing scale. A supplement to that is a group of functions that enable changing the part of the drawing that is displayed without changing the scale.

You can move the viewed part of the project on the screen by using the vertical and horizontal scroll bars or by using the “grabber hand”. You can switch the “grabber hand” on with the button on the “Functions” tab.

¨ To move the viewed fragment of the project with the “grabber hand”:

1. Click the “grabber hand” button.

2. Position the pointer within project area.

3. Press and hold the left mouse button (“grabber hand” pointer appears).

4. While keeping the left mouse button depressed move the viewed fragment in the desired direction.

! Double clicking the mouse when in realtime zoom mode or “grabber hand” mode, toggles these modes on and off. This enables convenient and fast viewing of the project

The graphical editor supports mice with scroll wheels that operate in the MS IntelliMouse™ standard or with an enhanced scroll wheel driver (usually dual wheel mice). The wheels may be used to move the viewed project on the screen (function of the “grabber hand”) or to zoom in or out stepless (“realtime zoom” function). The operating modes of the wheels are configurable (see section 7.3.3).

You can use the following keys when working with a wheel mouse to modify the functions of the wheels:

- no key used – realtime zoom in and out.

- Alt – move the viewed project using default functions of the mouse wheels.

- Shift+Alt – reduces the scrolling speed (more precise operation) using default functions of the mouse wheels.

- Ctrl+Alt – move the viewed project with mouse wheel functions swapped - useful with single-wheeled mice.