Here is a list of some constants that could be set:
styles.content.textmedia.maxW
This indicates that maximum number of pixels (width) a block of media elements inserted as content is allowed to consume
styles.content.textmedia.maxWInText
Same as above, but this is the maximum width when text is wrapped around an block of media elements. Default is 50% of the normal Max Media Item Width
styles.content.textmedia.linkWrap.width
This specifies the width of the enlarged media element when click-enlarge is enabled
styles.content.textmedia.linkWrap.height
This specifies the height of the enlarged media element when click-enlarge is enabled
styles.content.textmedia.columnSpacing
Horizontal distance between media elements in a block in content elements of type "Media & Images". If you change this manually in your CSS, you need to adjust this setting accordingly
styles.content.textmedia.rowSpacing
Vertical distance after each media elements row in content elements of type ""Text & Media". If you change this manually in your CSS, you need to adjust this setting accordingly
For more information
Open the "Template"-Module, select "Constant Editor" and "CONTENT"