A timeline viewer programmed with Python, using tkinter
Home > Timeline viewer help > “Cascading” menu
The event marks are stacked on the timeline canvas, so that they would not overlap or cover the title of previous events. If the stacking algorithm does not seem good enough to you, you can adjust its limits.
With Cascading > Tight, you can arrange consecutive events behind each other, even if they are close together.
With Cascading > Relaxed, you can arrange consecutive events in a stack, even if they are some distance apart.
With Cascading > Standard, you can reset the cascading to default.
Hint
Shift-Ctrl-Mousewheel.