Visitor Log -- Export -- CSV
Only 25 records exported.
See also Piwik Analytics Data Limits
That's the default. It's typically capped at 100 elsewhere. (IIRC that was raised on the forum as well.)
I suppose we can look at making it configureable.
Otherwise, the API is the place to go.
it's true there appear to be an error, as I manually specified 1000 but only got 25 results
Is this the API inconsistency that I ticketed elsewhere (limit vs filter_limit)?
Should probabably be reopened: 1.2 always limits exports to 20 rows, although filter_limit=100 in template.