Dear Francois and Martin,
I am actually very happy with the 10% and 50% overlap when reviewing raw data. @ewamsley: Another way of reviewing data in non-overlapping time-frames could be to cut them into epoches and asign different values to each epochs (jumping from one epoch to the next should be possible using 'F3' and 'shift + F3' to jump backwards).
What would have been very helpful during my last projects was marking events having a certain duration in a specific channel. The most effective way doing this is probably using the mouse. I would love to use such a function.
Best regards
Marcel