1) Document navigation
• Tab will hide your palettes and tools.,Shift + Tab only hides the palettes.
• Rolling the cursor to the edge of the screen while the palette and tools are hidden reveals them (move away to hide).
• Control + Tab will cycle though all open documents.
• The Page Up and Page Down keys move you one full screen up or down one full screen.
• Command (Mac) / Control (Win) + Page Up and Page Down moves left or right one full screen.
• The Home key moves to upper left corner,the End key moves to lower right.
• Use Window > Arrange to “Match Zoom”,Match Location”or”Match Zoom and Location”in all open documents.

2) Cropping
• To use the Crop tool to add canvas to your image, drag out a crop and release the mouse.Then, drag the crop handles outside of the image area and apply the crop.The area outside of the image will be added to the canvas.Note:to add transparency around the image (instead of filling the added space with the background color) convert the Background into a layer by selecting Layer > New > Layer From Background (or by double clicking on the word Background in the Layers palette).
• When adding additional images to a document,you can use Image > Canvas Size and enter the value.Or move the images into position and choose Image > Reveal All to have Photoshop automatically increase the canvas to include all “hidden”images information.
• To remove extra pixels or transparency from around an image,choose Image > Trim.
• You can use the selection marquee to select a area,then choose Image > Crop.
• To eliminate information outside or beyond the visible image area (possibly decreasing file size),choose Select All > Image > Crop.
• To use the dimensions of one image to crop another,select the document with the desired crop (width,height,and resolution) and click the “front image”button in the Options bar.This will enter the height, width and resolution for the document in the Options bar.Then, switch to the document that needs to be cropped and use the Crop tool.The aspect ration will be constrained while dragging the crop and,when applied,the image will be resized to the desired width,height and resolution.

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