Changing Amplitude Scale

The amplitude scale, i.e. the range of values shown on the screen, can be adjusted by changing the volume zoom coefficient displayed in the volume zoom box, situated on the toolbar. When volume zoom is set to 1, the full range of signal values is displayed, at the expense of reduced amplitude resolution. When the volume zoom coefficient is maximized, only a small fraction of this range is shown, but there is a one-to-one correspondence between sample values and pixel heights.

To change the volume zoom coefficient:

Click on the up/down arrow in the volume zoom box , situated on the toolbar.

Type a new value of the volume zoom coefficient in the volume zoom box and press the ENTER key.

Use the keyboard UP/DOWN ARROW keys to increase/decrease the volume zoom coefficient by a factor of 2 and CTRL+UP/DOWN ARROW to change it by a factor of 8.