There are a few ways to smooth jagged edges in Photoshop, and which method you use will depend on the image and the level of detail you need. For simple images, the Smudge Tool or the Blur Tool can be used to quickly smooth out any rough edges. For more complex images, the Liquify Filter or the Puppet Warp Tool may be better options.
The Smudge Tool is located in the Tools palette, and it can be used to smudge pixels around on the layer that is currently active. To use the Smudge Tool, simply select it and then click and drag over the areas that you want to smooth out. The strength of the effect can be controlled by changing the brush size and hardness, as well as the pressure settings in the options bar.
The Blur Tool is also located in the Tools palette, and it can be used to blur pixels on the active layer. The Blur Tool works in a similar way to the Smudge Tool, but instead of smudging pixels around, it simply blurs them. The amount of blur can be controlled by changing the brush size and hardness, as well as the strength setting in the options bar.
The Liquify Filter can be found under Filter > Distort > Liquify. This filter allows you to push and pull pixels around on the layer to create a variety of effects.
To use the Liquify Filter, simply select it and then click and drag over the areas that you want to distort. The amount of distortion can be controlled by changing the brush size and pressure settings in the options bar.
The Puppet Warp Tool is located in the Tools palette, and it can be used to warp pixels on the active layer. To use the Puppet Warp Tool, simply select it and then click and drag over the areas that you want to warp. The amount of warp can be controlled by changing the brush size and pressure settings in the options bar.