Image title/caption

It is not currently possible, because I’ve hidden the sidebar with CSS. I personally like having a cleaner media overlay. However, you can change this. Open up the admin.css file, which you can do via the Editor menu inside WordPress, or by FTP.

Inside that, look at the very beginning. The first rules you should see should be setting left:0 for three different things. After that, there are three things set to right:0. Remove that second section, which is:

.no-sidebar .attachments-browser .media-toolbar,
.no-sidebar .attachments-browser .attachments,
.no-sidebar .attachments-browser .uploader-inline {
    right: 0;
}

Finally, remove the very first line of the next section, which is:

.no-sidebar .media-sidebar,

—-

So, the first 18 lines of admin.css change from:

/* Remove the Details Sidebar on Media Overlay */
.no-sidebar .media-frame-title,
.no-sidebar .media-frame-content,
.no-sidebar .media-frame-router {
	left: 0;
}
.no-sidebar .attachments-browser .media-toolbar,
.no-sidebar .attachments-browser .attachments,
.no-sidebar .attachments-browser .uploader-inline {
	right: 0;
}
.no-sidebar .media-sidebar,
.no-sidebar .media-frame-menu .media-menu a,
.no-sidebar .media-frame-menu .media-menu div,
.no-sidebar .media-toolbar-secondary,
.no-sidebar .media-frame .attachment .describe {
	display: none;
}

To:

/* Remove the Details Sidebar on Media Overlay */
.no-sidebar .media-frame-title,
.no-sidebar .media-frame-content,
.no-sidebar .media-frame-router {
	left: 0;
}

.no-sidebar .media-frame-menu .media-menu a,
.no-sidebar .media-frame-menu .media-menu div,
.no-sidebar .media-toolbar-secondary,
.no-sidebar .media-frame .attachment .describe {
	display: none
}

This will get the right-hand sidebar back.

Perfect! Thank you for the help and thanks again for the plugin ??

Hi, I am looking at this issue as well, because want to change the image captions and other details.

Can you make it default to collapse mode?

ps: I don;t want to modify core plugin files as there will be a loss when you update the plugin. Forking the plugin just for this little modification is not good either.

Created a new thread for the popup sidebar, #ref:
https://www.ads-software.com/support/topic/media-popup-sidebar-and-text