If you go to the fieldtrip tutorial website you'll get a step by step explanation on how to get a popup window either for each trial or for each channel - then you can just click on them to reject the ones that you want to get rid of ( cfg.method = 'trial'; # 'channel' ft_rejectvisual(cfg,data); )
Best just go through this http://fieldtrip.fcdonders.nl/tutorial/visual_artifact_rejection.
as to repairing there's ft_channelrepair but can't help with gui for that. I guess just visual inspection and then using that function on whatever you found that needed repairing.
thanks a lot for your answer. Yes, I gave a glance at every page of documentation. Though, I was wondering if someone has built some kind of personal software, just to know if there are advantages or not. I found a little "dangerous" to manually change parameters inside the code for every analysis. Every time I fear that something changes and doesn't work anymore. (or... nevermore ! :-D )
I know it's a pain, but I guess you do have to tweak it a bit yourself - the script skeleton from fieldtrip does not encompass everything.
I just used the standard visual rejection and repair with tweaks, but if you are looking for people with scripts it would be best to go to the fieldtrip forum I guess.