When you want to lock the transparency of the layer, you can click the checkered icon near the "Lock:" options in the Layer panel, or you can simply press

Which resolution will provide the highest quality for a printed image?

You can create new video layers by adding a video file as a new layer.

In a video layer a section of the footage in selected layers can be deleted, leaving a gap of the same duration as the removed section.

What does Field blur do?

What keyboard shortcut creates a new layer?

To align multiple layers to their Top Edges you...

Way to apply a filter to a layer without destroying the original content of that layer.

How do you open a closed note?

NOT a light type in Photoshop 3D panel?

Default keyboard shortcut to step backward multiple times?