Search Button 
Left clicking on a search button searches back in time (previous match.) Right clicking on a search button searches forward in time (next match.) See 'Define Searches' for details on creating searches.
Invoking Searches
There are several methods of invoking a search. Each presents a slightly different way of selecting the search and the target window, but they all perform the search in the same manner.
If the search is configured to search 'from center time', then the search starts from the center time of the FOCUSED window (possibly the last match). Otherwise the search starts from the search's marker position (possibly the last match). In either case, the marker is positioned at the location of the search match and then the FOCUSED window is centered on the marker. If the window is part of a link group, then the entire link group is centered as well (see: Link Groups). The center time of the FOCUSED window does not change if the search fails.
Regardless of how the search is invoked, we actually always run the DEFAULT search on the FOCUSED windowed. We simply CHANGE the DEFAULT search or the FOCUSED window before running the search in some cases. This creates a very consistent environment where you can jump from one search button to another without surprises. The last invoked search is always the current DEFAULT search and the last searched window is always the currently FOCUSED window (until you do something to change it), regardless of how the search was initiated.
Global Search 
Beside the search selection box and search edit button is a SEARCH button. This search button performs the Active Search, using the currently FOCUSED window as described without changing either.
Local Search
Each Data Table, List and Waveform window has a local search button. When you click on a window's local search button, that window becomes the FOCUSED window and then the search is applied to it as usual (using this newly FOCUSED window). Clicking on a local search button is the same as clicking anywhere on a waveform or table to FOCUS it and then clicking on the Global Search button.
Search Manger Searches
When you click on a search button in the search manager, the DEFAULT search is changed to that button's search and then the search is performed as usual (using this new DEFAULT search). This has the same results as selecting the button's search from the Default search selection pull-down and then clicking on the Global Search button. (see: Search Manager)