Data doesn't start at 0

Hi, I've noticed that when I view my data the starting point is not 0. For example below you can see the starting is 17s:

image

When I input 0 is just resets to 17 in this case. Is there data here that isn't being shown or is this a problem in my dataset? I'm interested because I have a stimuli-train and need the data before my stimuli for baseline correction. Thanks!

This is not necessarily a problem, it depends on the file format.
For example, Elekta MEG recordings typically don't start at zero.

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Ah right, mine is Elektra based data. So the data is all there, and not being cut off in any way---correct?

This seems normal. The missing time at the beginning correspond to the day between the start of the acquisition software (which shows the data before starting to record, for quality control), and the actual start of the recordings.

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Great, thanks a lot for the answer!