To render a block of text as a different element with the keyboard (to change for example a Scene Heading to Action), simply place the blinking cursor in that block of text. There's no need to highlight the entire section.
Windows: Press Control + Shift + Number of the element to which you'd like to convert the text. The element number is displayed at the bottom of the script window when you press and hold down the Control key.
Mac: Press Command + Option + Number of the element to which you'd like to convert the text. The element number is displayed at the bottom of the script window when you press and hold down the Command key.
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