I want to put my words into 3 block letters as the background. How do I do that?

WordClouds.com
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I want to put my words into 3 block letters as the background. How do I do that?

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From the menu, select Shape → Select shape.
Select the “Text” tab. At “Text”, enter the 3 block letters. Select a font you like and you have a word cloud in block letters.