Hello, I would like to offer some suggestions for you. The first question is whether it is possible to optimize the toolbar so that it can only be on top or bottom, because for example, marking in an article requires using different pens, and the distance between switching points is too far, making it inconvenient to make it a column on the left and right may be much better. Secondly, I suggest setting the thickness of the pen and the straight line separately. For example, if I use a thick line pen and want to use a thin line to draw, I have to switch to the straight line and adjust the thickness, which is very troublesome. I hope they can be set separately. The third warm question is whether it is possible to create a free split screen within the software, as using an iPad for split screen can only have two proportions, which is very uncomfortable. You can refer to these suggestions, hoping that your software will become better and better.