Decreases the horizontal zoom level of the graph area. The zoom level is decreased by half, such that the same time interval covers half the horizontal extension after zooming out. If possible, the graph area will also scroll such that the cursor stays at the same screen position.
All elements of the graphs are shown, also in zoom levels of less than one pixel per cycle. For instance, consider a graph of a signal that is 0 for all cycles 0 through 1,000,000, except for one single cycle in the middle, where it is 1. This spike will be seen in the graph, regardless of how far out you zoom. However, a consequence of this feature is that drawing can become slow at very low zoom levels.
Available when the current zoom level is greater than 1/1,000,000 pixels per cycle.