In my opinion, the buttons must be relocated according to what is expected from them, I see Save Clear and Delete, then I see Process and View result, then Add child and change conditions, and I am not sure they all belong to the same form.
Think of the buttons as what they will do next, Save will do nothing but save, so it is a big button at the bottom of the page, "clear" on the other hand should be a link button, Delete, is dangerous, maybe a red delete button somewhere at the top right corner, Change conditions still needs more input from user, Add child should be below the part that will be appended (not clear in your screenshot what child is to be added)...
Bottom line, i think you should rethink your button locations, it isn't a question of how to shape them, Save and Clear cannot sit together of the same weight, your users will hate you for it, if you translate your screen to English it might be easier to help you figure out the right locations.