Assigning a class to Collapse-o-matic drawer

The result I need is something like this:

<div class=”collapseomatic MY_CLASS” id=”id9602″>

What is being referred to by ‘drawer’?
How are you generating the expand elements, by using a shortcode, or the roll-your-own method?

If the shortcode is being used:
To assign a class to a TRIGGER, use the trigclass attribute.
To assign a class to a TARGET, use the targclass attribute.

In the example you provided:
<div class="collapseomatic MY_CLASS" id="id96022>
This is a trigger, dude to the collapseomatic class. Therefore, the trigclass attribute would be used like so:

[expand title="trigger text" trigclass="my_class"]target text[/expand]

If you can be more specific on what you need, we will provide a more specific answer.

Wow, so quick answer!

In the meantime, doing some tests, I started to understand what trigclass and targclass mean, and it is very clear.

Sorry Twinpictures, I didn’t realized that trigger and target were on the same level. I was thinking that somehow the trigger contained the target so, assigning a class to a wrapper, it worked for both.
I was tricked by the ID tag, if I use it, it somehow control both.

To make you understand better, if I used the “READING” ID, I wanted some elements of both items (trigger and target) to be hidden, and it worked.
But I’m not very good in CSS and I notice there’s a #target-READING in the code, that maybe works for ID but not for class.

In short words, sorry, I opened an useless post. But at least it helped me to understand how Collapse-o-matic works. ??

No worries! Glad you got things figured out.
Consider leaving a little review of the plugin or its support!
Issue marked as resolved.

Just left a quick review.
So many years I’m using this plugin, many thanks. ??

very kind of you, thank you!