These two options allow you to change the font size for your text on a default card and to also change the line height (space between the rows). The same option is present for an active card and it controls the font size and line height on that card.

This option allows you to modify the look even more and make your WordPress Timeline even more unique.

This is the text that is affected by this setting
Input your own values for font size and line height

Simply input the value in pixels and adjust your Content Timeline to fit your design perfectly