Which feature blurs edges by building a transition boundary between the selection and its surrounding pixels?

Pressing Cmd (Ctrl) + Z Toggles the last history state in Photoshop. What do you press to keep undoing?

How do you turn a standard layer into a background layer?

Shortcut for the eyedroper tools is

Shortcut key for the horziontal type tool, Vertical type tool, horizontal type mask tool and the vertical type tool?

Shortcut for the Eyedropper tool?

..... is a process in which Photoshop responds to your size-change

The Mode pop-up menu of Puppet warp tells Photoshop how stretchable you want the mesh to be.

What are the names of the tools marked in red in the image above?

You can apply Brush, Eraser and Clone Stamp on vector based layers

Which image(s) belongs to the red channel if the source image is in RGB mode?