Spectrogram View
If you try to rotate a 3D graphic to set the viewpoint somewhere on the Z-axis (view the 3D graphic from above), you will find out that it is not possible. That view is implemented as a separate option called “Spectrogram view”.
You can switch to a spectrogram view by selecting “3D Tools/Spectrogram view” from the menu, or by pressing the button in the toolbar.
All operations, including cursor handling, zooming, colors changing... are the same as with standard 3D-graphics. In addition, you can use a mouse rectangle selection to zoom-in fast to part of the spectrogram. Also, by using a mouse wheel, you can perform a fast zoom-in or zoom-out on a spectrogram view.
By dragging a rectangle selection while pressing Ctrl key, you can measure rectangle dimensions without zooming in.
The time axis is always shown from left to right (X-axis). The direction of the frequency axis (Y-axis) can be changed by using the main menu option "3D Tools/Spectrogram frequency direction".
If you move your mouse cursor over spectrogram view, current X/Y values under the cursor will be shown as a tooltip.