how to control the BackgroundAlpha of the text box

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lang 2025-8-20
评论： Les Beckham 2025-8-22
Is there a way to create a text box with BackgroundAlpha (such as 0.5)? I can't find the alpha option for text box background in Text Properties.

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Les Beckham
Les Beckham 2025-8-20
Ran in:
You can use the undocumented feature of a 4-element color spec (the fourth element is the alpha). For example:
plot([0 1], [0 1]);
ht = text(0.45 ,0.5, 'This is a test');
set(ht, 'EdgeColor', [0 0 0], 'BackgroundColor', [1 0 0 0.4]);

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