Default settings
Default unit for size
Here you decide what unit for size should be the default when making unit settings on the website. Unless changing this setting em (relative measure) is default on newly created web page and pixels are default on older websites. It is possible to choose between pixels, em, and percent.Hence, if you choose em and then need to add a padding on a portlet you only need to click the arrow up or down in order to have the correct unit.