Vanguard LTCA-10, LTCA-40, WRM-10P, WRM-40 - Manual (Page 47)

REV 3 LTCA VERSION 2.xx SOFTWARE MANUAL
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3. Release the LEFT mouse button. The graph expansion for the selected region will be
displayed:
When viewing a graph expansion, horizontal and vertical scroll bars will be displayed
that can be used to navigate the graph.
4. To return to the full graph view, right click anywhere on the graph and select Undo
Zoom from the pop-up menu.