The results of a search are typically displayed in a Search Results window. There are generally two ways to access a line item (row) for viewing or editing line item information:
Double-clicking the row invokes the default action, for example: Edit.
Right-click on the row and select an option from the shortcut menu. If the drop-down list has a bolded option, you can also double-click on the row to perform this function.

Note
When you're in a Window with a list, for example with rows in alternating shades of gray or a white pane, you can access all applicable actions for the list via the shortcut menu (right-click anywhere in the list).