The “Show/Hide Events” mod originally written by Jeff Robison has been incorporated, meaning that you can configure your Custom Event Types so that some of them start “collapsed” (all lines hidden except the top one).
Visitors may still expand those lines at will.

There are two ways to set this. It can be done on each custom event individually:

Of you can do it in bulk by clicking the ones you want to display collapsed and choosing the button at the top to collapse:

Here’s what it looks like before and after. There’s only a small amount of data here, but if you had a large amount of text to display, this would make a real difference: