Which option allows you to change the Background layer's appearance when part of your image is transparent?

Using Render filters, you can

Substractive color system used for?

How 'Expansion Field' of Puppet Warp tool work?

What do the width and height of the histogram in levels adjustments represents?

Option to increase or decrease the size of the mask while editing the mask?

Which color mode can be converted to Duotone?

How do you hide or show all panels, including the Toolbar and Control Panel.

How to be able to open RAW files in Photoshop?

Magic Eraser tool...

How could you convert a color image to grayscale?