I designed a site with several boxes (which located one under the other). Each box contains information about a specific topic- a title (the name of the subject) and a text (the explanation of this subject).
In the initial state, the box shows only the subject's title. Clicking on the box expands the explanation text (with a slide affect).
How to illustrate this box as an expandable which contains also the explanation of the box's title subject?
I want this to be intuitive and that people will immediately understand that all they need to do to get the explanation is to click on the box.
Before the click:
After the click: