There are several 'Tree Views' that you can use to navigate your tree and add an individual. Click the 'TreeViews' icon on the toolbar if it's not already selected, then use the Tree Views links below this (such as Pedigree) to choose which tree you would like to work with.
Adding people to your tree can be done in any of the 'TreeViews', or you can use the 'Individual' menu at the top. There are multiple ways of adding more family members to your tree - you can right-click on their name and choose one of the options in the menu; or you can go to the 'Individual' menu on the menu bar; or you can use the 'Add' boxes in any of the 'TreeViews'. Below are some different ways of adding these family members to help get you started.
Select the 'Pedigree' TreeView and choose the person you want to add parents to from the list of names on the left hand side of the screen. You will see them appear in the pedigree view on the right, along with an 'Add Father' and 'Add Mother' box. Click either of these boxes to add a father or mother to the individual.
Select the 'Family' TreeView and choose the father or mother you want to add a child to from the list of names on the left hand side of the screen. You will see them appear in the Family view on the right, along with their parents and any children that have already been added. Click the 'Add Child' button underneath the parents' names to add a child to the couple.
Select the 'Pedigree' TreeView and find the person you want to add a spouse to on the screen. Right click on their name, and select 'Add Spouse' from the menu to add a spouse to the individual.