In the conditions panel we can find a first part of it which details the conditions which are being edited. After that there is a bigger one where we can edit the conditions. In addition there is a button to add new conditions and accept the changes. 
At this part of the panel we will find a brief description which corresponds to the condition we are editing.
At this part of the panel we will find two buttons. Through them we can add new conditions or just accept the changes introduced to the conditions we are editing, and closing the window.
In this panel we will find a very graphic description of the condition we are implementing. When we put the pointer over a condition we have the next following posibilities:
When we add a condition, this will be added after the all existing conditions. If we want to add a condition in the middle position the best way to achieve this is chosing the previous condition to the place we want to insert the new one, duplicate it, and afterwards modificating the value of the new created condition.