I have been testing telestrator and I see some details when using it.
1.- the dynamic size of the objects that are added to the screen (it changes its size when adding and dragging the mouse).
2.- the placed images are static in their position (if I wanted to move the image now I have to undo a step and add the image again).

To overcome this it could be better.
1.- an option to give the thickness of the lines if lines or boxes or points are used, in this same sense if images are used an option to give the size to all the objects or a checkbox if I want a fixed size for all the images that I am going to add or a variable size by dragging the mouse.
2.- select the added image and be able to move its position (if it were possible to have a box with the list of added objects and select which one I want to move or change - color, size, etc.).
3.- change the color of the pointer (currently it is only red)