• Adobe After Effects Expressions

  Toggle transparency

  Posted by Jace Bradley on April 6, 2022 at 12:59 pm

  Hello! I am new member 🙂

  I already have a question.

  I created a simple UI window with a button to toggle on off transparency.

  I ‘m just learning. When I search the Scripting guide I see;

  app.project.transparencyGridThumbnailsapp.project.transparencyGridThumbnails

  First, what’s Boolean; read/write. I thought Boolean was true and false or is read/right the same thing?

  How can I tell the function to turn the transparecy on and off?

  Thank you.

  Sean Walkup replied 4 years, 4 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Tomas Bumbulevičius

  April 9, 2022 at 5:20 pm

  Hey Jace. What object transparency we are talking about? Where and what you want to toggle on/of? Is it a layer in the composition? If so, do you select that manually, or how it will be decided what to turn on/off?

  Or are you talking about transparency in they GUI?
• 

  Sean Walkup

  April 12, 2022 at 1:38 pm

  Not sure I completely understand your need, but maybe this will help.

  Here is how to turn another layer on and off with a checkbox expression control. I use this all the time to control dozens of things in mogrts for Premier.

  In this example, I have an empty shape layer named Controllers that contains a checkbox. I have another shape layer called Square, and in its opacity, I have this:

  var cbx=thisComp.layer(“Controllers”).effect(“Checkbox Control”)(“Checkbox”);

  if(cbx>0) {100} else {0}

  Hope this helps.

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