Click 
to define Nodal Loads. For details, see Nodal Loads.
The Nodal Loads form appears.
Add a Nodal Load FX=30 for Node 2.
Click "Add Nodal Load". Then add a Nodal Load FX=50 for Node 7.
Click "Add Nodal Load". Now the Nodal Loads should look like this.
Click OK to exit. Now the Model should look like this.
