If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Opacity is set using a decimal where 0 is transparent, 0.5 is 50% and 1 is solid.
The Youtube video embed is responsive so it should expand to the width of its parent. If you do need to set a width you can apply the Width CSS property through the Style Builder.
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