Perhaps you are not ready to send candidates a message yet but you do want to save the candidates profile for later.
You can save a candidate profile by clicking the 'heart' icon on their profile or by making a selection of profiles and clicking the Action button, and then then click 'Save to Favourites'.
For every profile that you save you can find them back in your 'Favourites' on the left side of your screen. In each Search, those saved profiles in your favourites will be visible for you.
You can always go back to your latest searches by going to the top navigation bar where your searches are displayed.