Click 
to define Nodal Loads. For details, see Nodal Loads.
The Nodal Loads form appears.
Add a Nodal Load FY=-5 kN for Node C.
Click "Add New". You get the following.
Then add a Nodal Load FY=-3 kN for Node D.
Click "Add Nodal Load". Now the final Nodal Loads should look like this.
Click OK to exit. Now the Model should look like this. The Nodal Loads have been applied!
