Command Update Search (Search menu)
In the search menu you will find the command "Update search". With this command you can update the results of your search. New hits will be added to the results already listed in the result table.
The update of a certain search should be considered, for example, if you had deactivated some sources from your first search. If you now want to search through these sources to gain more hits you only have to activate the sources again and then click on the command "Update search". New hits found in the reactivated sources will be added at the bottom of your previous result table.
TIP
If you want to distinguish new results more easily, you should activate the function "Mark as read" before. You find this command in the search menu or as a symbol in the toolbar. If the function is activated, new results will appear at the end of the result table and will be highlighted.
You can find further information under:
Search menu
Source panel
Command Mark results as read (Search menu)