From SIGVIEW v2.0 onwards, you can use the mouse-wheel for faster zooming in/out and moving through signal.


X-axis


If you simply position the signal ruler somewhere in a signal and turn your mouse-wheel forward (away from you), the signal will be zoomed in to 20% of its original length. The ruler will remain on the same signal position. Zooming out can be performed by turning the mouse-wheel in the opposite direction. Please note that these zoom steps will not be saved in the zoom history.


There are also two keyboard modifiers which can be used to achieve special zooming and moving functions, in combination with the mouse wheel:


Ctrl key + mouse wheel: Instead of zooming, you will move through the signal by turning the mouse wheel. Turning it forward will be equal to pressing the left arrow key and turning it backwards will be equal to pressing the right arrow key.


Alt key + mouse wheel: Zooming in/out will be performed as described above, but the length of a signal segment in samples will always be a power-of-2 (i.e. 1024, 2048,4096...) for each step. It is especially useful for zooming in on signals where FFT function will be performed afterwards.   


Y-axis


To use the mouse wheel to control the Y-axis, move your mouse to the area between the left edge of the signal window and Y-axis display. The mouse pointer will change to show a symbol, as in this image:


graphic



Turning the mouse-wheel forward will zoom-in the Y-axis around the current position of the small arrow in the cursor pointer. Turning the mouse-wheel in the opposite direction will zoom-out from the Y-axis. Again, the center position for this operation will be the position of the small arrow in the mouse pointer.


Ctrl key + mouse wheel: Instead of zooming, you will move the entire Y-axis up or down.