Hey everyone. I have a simple question. I just got the notability app have a question about the when you use figures under the tab that let's you make triangles and circles. What is the very first thing above the squiggle that let's you draw for? I have been trying to figure it out but when write nothing happens. Also where is the eraser in the figure. Finally what is the line next to the dot that controls thickness used for? I cant even click on it. Any help would be greatly appreciated. Thanks.