how to control the BackgroundAlpha of the text box

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.

Answer 1

[Les Beckham]

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]);

[lang]

It works, thanks!

[Les Beckham]

You are quite welcome.