This property supersedes TextLabel/FontSize since it is a number and not an enum. Internally, Roblox uses several sets of pre-rendered character images for each size of each font. It chooses the closest size to TextSize, then scales that set of character images to render text. Before the introduction of this property, you could only pick from the pre-rendered sizes, which were listed by the Enum/FontSize enum.

Code Samples

“Kaboom!” Text

This code sample repeatedly tweens a TextLabel’s TextSize from 5 to 100 and fades out the text as it grows in size.

local textLabel = script.Parent

textLabel.Text = "Kaboom!"

while true do
	for size = 5, 100, 5 do
		textLabel.TextSize = size
		textLabel.TextTransparency = size / 100
		wait()
	end
	wait(1)
end