When you’re transforming a Smart Object in Photoshop, the bounding box around the object looks different than when transforming a pixel base object. With a Smart Object the transformation's corner anchor points are solid dark grey,
When cropping an image in CS6 or newer, you can see the final result by matching the Crop Shield's overlay color to the canvas color. To do so, create your crop border, then click on the Crop Options icon in the Options Bar, and increase the Crop Shield Opacity to 100 percent, and set the Color to Match Canvas. This will cover the crop area with your canvas color, and will allow you to see what the final crop will look like.
To select any color from outside of Photoshop first select the Eyedropper tool (I on the keyboard). Then left-click-and-hold inside of your image in Photoshop, and drag the cursor outside of Photoshop to any other
To move an object just one pixel at a time, simply tap the arrow keys on your keyboard when you have the Move tool selected.If you have another tool selected, press-and-hold Ctrl (Mac: Command) and tap the arrow keys.
Apply multiple filters at a time in the Filter Gallery (Filter > Filter Gallery) by clicking the New Filter button at the bottom of the filters list, and then select a filter. You can repeat this process and add as many filters as you like!