Sketch tip: Set a relative line-height for text
by Christian Krammer from sketchtips.info
By default the line-height of text in Sketch (“Spacing > Line” in the Inspector) is relative to the font size. So if you resize the text its line-height grows or shrinks according to the size. But the moment you change the line-height manually this relationship is gone and it remains at the same value, which is independent from the size. To restore this behaviour just empty the “Spacing > Line” field in the Inspector and it goes back to “auto”.
However there is no way to set another relative line-height than the default one. But there is a trick: You can use the “Scale” option from the Toolbar to resize text and keep all of its properties. So if you have text with a font-size of “16px” and a line-height of “32” (1.5) and want to change it to “21px”, then select “Scale” from the Toolbar, enter “131 %” (21/16 = 1.3125 * 100%, Sketch doesn’t allow decimal numbers here) and you get text that’s roughly “21px” with a line-height of “42”. Not ideal, but still way better then the constant need to adapt the line-height if you resize text.
