Depending on how much detail or summary is required, you can either increase or reduce the time scale solution by
If you have modified the time scale solution and want to gain the overview back again, click the icon and the time range as having been defined in the "Setup" dialog will be completely shown again.
Zoom the diagram in or out by <Ctrl> + mouse wheel.
Please note that the modifications in the histogram area will always be set back and hence are not permanent.
If you wish to modify the resolution of the numeric scale in the histogram, place the mouse cursor on the numeric scale and drag it either upward (enlarging) or downward (reducing).
Accordingly, you can modify the height of the histogram. Drag the horizontal splitter bar between histogram and table/diagram area upward or downward. This is only possible when a vertical scrollbar is shown!
You can modify the width ratio between the table and the diagram by moving the vertical splitter bar between them.