Hello! This is possible but only to a very certain extent. When you click on "Options" on the menu on the bottom on your screen, you can change between partial, total and other kind of views, configure how many generations of descendants, ancestors and other family members you want to have displayed, and what direction the tree should run (like "growing" from the first generation down to the last, or up from the first generation to the last, or from right to left or left to right). You can also change siblings' birth order (if you didn't add birth dates).
However, it is not possible to i. e. change the empty space between two siblings, totally prevent lines of different descendance to cross, or make the parents placed exactly in the middle above their children. This can be annoying, especially on larger trees with a lot of members and possible intermarriage between different branches, but can't be helped (as far as I know).
Hope this helps!
