event_header too small

In my week view the scheduler.templates.event_header appears too small. There are only shown the start-times, but not the end-times.

See:

Can I insert a line break to make the field bigger?
Or can I set the week view only to “working week”, so that the Saturdays and Sundays won’t appear anymore (see my thread here)?

You can add the next code ( to the end of dhtmlxscheduler.js )

scheduler.templates.event_date = scheduler.date.date_to_str("%H");

It will shorten date string, so it will be fully visible.
As for multiline - header, height of header is fixed in css, and while it can be changed, there is no guarantee, that it will not have any unwanted side-effects.