Chart Scaling
The Chart Scaling tool allows you to zoom in or zoom out an arbitrary area on the chart. It is activated through the context menu or the tool selection menu.
Tool activation
The tool is activated by clicking the scaling icon 
in the tool selection menu. When activated, the ECDIS cursor changes to 
Zooming in
To zoom in on an arbitrary area of the chart:
Using the mouse: press and hold the left mouse button at any point on the chart and, without releasing, move the cursor in the south-east or south-west direction, defining the selection area (orange frame).
On a touchscreen: touch the screen at a point on the chart and, without releasing, move your finger in the south-east or south-west direction.
The area bounded by the frame will be zoomed in and fitted to the chart window dimensions.
Zooming out
To zoom out of an arbitrary area on the chart:
Perform the same actions as for zooming in, but with different frame construction directions: north-east or north-west.
The area bounded by the frame will be zoomed out.
Operating features
Directions for scaling:
Zoom in: cursor movement in the south-east or south-west direction
Zoom out: cursor movement in the north-east or north-west direction
Visual indication:
The selected area is displayed with an orange frame
After releasing the mouse button or finger, scaling is applied automatically
Tip
For precise scaling, select an area corresponding to the chart section of interest.
The scaling tool is especially useful when working with detailed chart areas or when you need to quickly switch to an overview.
Note
The direction of cursor movement determines the operation (zoom in or zoom out). Remember: southward direction — zoom in, northward direction — zoom out.