Content display preference for 'Show Less' post height

I’ve just begun using Mattermost today. I am using it to capture ideas from a recent design meeting. After having entered several posts, I’ve noticed that large posts display a “Show More/Show Less” control. The Show Less view by default shows around 25 lines of text. When searching for content (and even in general) I’d like to configure the height of this view to something more like 5 lines of text. In this way I can see more of the content ‘summaries’ on the screen at once. I would expect this preference to be configured in the Account Settings/Display page.