1	blending mode		_____	Similar to tolerance, in that the lower the value, the closer the color pixels must be to be selected.
2	crop		_____	a series of dotted lines indicating a selected area that can be edited or dragged into another image.
3	flattening		_____	Small boxes that appear along the perimeter of a selected object and are used to change the size of an image.
4	layer comp		_____	Horizontal and vertical lines that you create to help you align objects.
5	layer group		_____	merges all visible layers into a single Background layer and discards all hidden layers.
6	layer thumbnail		_____	A feature in which the border of a picture or portrait fades into the surrounding color at its edges.
7	marquee		_____	A feature that lets you protect or modify a particular area; created using a marquee.
8	merging		_____	The range of pixels that determines which pixels will be selected. The lower the value, the closer the color is to the selection. The setting can have a value from 0
9	object layer		_____	The temporary storage area provided by your operating system, for cut and copied data.
10	opacity		_____	a layer containing one or more images.
11	rasterized		_____	a variation on the arrangement and visibility of existing layers that can make your work more organized.
12	selection		_____	contains a miniature picture of the layer’s content, and appears to the left of the layer name on the Layers panel.
13	clipboard		_____	Combining images from sources such as other Photoshop images, royalty-free images, pictures taken from digital cameras, and scanned artwork.
14	compositing		_____	an area in an image that is surrounded by a selection marquee and can then be manipulated.
15	deselect		_____	turned into a bitmapped image layer.
16	fastening point		_____	A command that removes the marquee from an area so it is no longer selected.
17	fuzziness		_____	combining multiple image layers into a single layer.
18	guides		_____	An anchor within the marquee. A small circle appears on the pointer when you have reached the starting point.
19	handles		_____	affects the layer’s underlying pixels or base color. Used to darken or lighten colors, depending on the colors in use
20	mask		_____	an organizing tool you use to associate layers on the Layers panel.
21	tolerance		_____	determines the percentage of transparency.
22	vignette		_____	to exclude part of an image. It hides areas of an image without losing resolution quality.
23	vignette effect		_____	A feature that uses feathering to fade a marquee shape.