Take a look at the Calculation screen
The Project Manager screen should be replaced with the General Timber Beam calculation screen shown below. Please observe the following areas of the screen....they are typical to ALL calculations in the Structural Engineering Library.

The Data Entry Tabs on the LEFT half of the screen are where you enter your INPUT values.
The Results & Graphics Tabs in the RIGHT half of the screen is where you review the calculated values, sketches, stress graphs that result from calculations on your input values.
When you are using ANY of the 45 Structural Engineering Library calculation modules the screen will ALWAYS be laid out like this. This enables you to display the tab on the right side that you want to look at and see how the changes to input data on the left effect it.