Pointofix (with multiple editing functions) is a very interesting free small program, which allows us to draw circles, threads, arrows or type directly on the screen, making it convenient to treat the whole computer screen as an electronic whiteboard (or blackboard), and directly use various symbols such as lines, circles or arrows, hooks, etc. to doodle or make various marks in the windows, patterns and charts of the screen. ! You can download it from 36 Software Manager (safe).