Reply #8: Just play around with it and experiment [View All]

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Try all the tools, all the commands, all the filters and effects. Remember that a command, filter, tool or effect is only going to operate on the portion of the image that is selected (the area with the "marching ants" surrounding it). Sometimes you try to give a command or filter, or use a tool, and nothing happens. That means you're trying to use the tool on an area of the image that is not selected or the command, filter or effect doesn't have any effect on the pixels that are currently selected. If there is no area selected, the command or filter is applied to the entire image, or the tool can be used anywhere.