Rectangular Marquee tool :- It is used for selecting a rectangular portion of image for using this tool, click on the tool and drag the mouse- cursor on the image diagonally when you drag the mouse-cursor a dotted rectangle appers. For deselecting click somewhere else on the image or press ctrl+D.
Polygon lasso tool:- with this tool you don’t have to drag just simply click and move and click there only which you want to select. If you finish selecting than double click or click on the straight point.
Lasso tool:- This is free selection tool, just click the tool and drag it on the image to select the desired portion of image. Photoshop connects your starting point to the ending point.
Move tool:- This tool is used to move the selected part of image, layers and guides. To move a layer make the desired layer active and drag it with move tool.
Single Row marquee tool:- This is used for selecting a single row of pixels . just click the tool, than click at the desired spot on the image and a horizontal dotted line appers there. It is used for removing the borders of picture.
Single column Marquee tool:- This is used for selecting a single column of pixels just click the tool. Than click at desired spot on the image and a vertical dotted line appears there. It is also used for removing the borders of picture.
Eliptical marquee tool :- this is used for selecting an elliptical portion of image. Click the tool and drag the mouse cursor on the image diagonally when desired portion of image is selected, stop dragging the mouse.
Magic wand tool :- this is used for selecting the whole portion of a particular color for example if you want to select the all red part of the image than click the tool and click the yellow spot in the image.
Magnetic lasso tool :- this tool is use for selecting the portion of image with a distinc boundary for this click the tool, click at the starting point, now move the mouse along the distinct edge to finish the selection and click again at the starting point.
Crop tool :- This is used to crop the image for this click the tool. Drag the tool on the image diagonally to draw a dotted rectangle. If you don’t want to crop the image than press esc key.