In the navigation pane, go to the Signal Selector.

Select or clear the check boxes for the signals as required.
Your selection is used for all loaded signals. The corresponding chromatograms are shown or hidden in the Chromatograms window. Injection results are also filtered corresponding to your signal selection.
In the Injection Tree, expand the Signals list for the relevant injection.

Select or clear the check boxes for the signals as required. You can select different signals for individual injections.