For optical detection, the opacity or transparency of the substrate material defining the detection chambers will generally have an effect on the permissible detector geometries used for signal detection.
Depending on the effect you want, you may need to revert the Opacity field for the individual items to 100% otherwise, each item's opacity is added to the group's opacity..
You will notice that there are two opacity parameters in this effect- one is the standard opacity and the other sets how the current frame of the video is mixed with older frames that are used to make the trails.
In Settings, go to General< Accessibility< Style, where you can choose an existing caption style or create a new style based on your choice of: Font, size, and color Background color and opacity Text opacity, edge style, and highlight.
The scientist Michael Faraday described the situation in a letter to The Times in July 1855: shocked at the state of the Thames, he dropped pieces of white paper into the river to"test the degree of opacity".
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