Need help with opacity (trensparency is blocked)

Hello, (Sorry if my english is not perfect)

I recently started to use Toon Boom Harmony with only some tutorials on internet to learn, and I’m facing a problem that no search can give an awnser to it :

In the tool properties, there is a section called transparency in the settings of the brush/eraser, but I can’t set anything in it,it’s just blocked, and it means I can’t use opacity on my brush/eraser.
I don’t know what to do, I hope someone can help me.


The Transparency tab’s options are only available on vector layers if the Brush Type option of the Tip tab is set to Textured Vector Brush.

On bitmap layers, those options are always available.

Scroll down to Transparency Tab