The completed image after the Content Aware has been applied to the image is shown bove, this can be compared to the original image below.

There are two ways to apply content aware. Firstly using the Spot Healing Brush Tool, which is selected from the left menu column as indicted below.

After selecting the spot healing brush tool, Content-Aware is selected from the top bar as shown below.

The areas of the image that require the content aware fill can then be brushed in.

The second method of applying the Content Aware is to select the area you require to fill, then select Edit/Fill and then select Content Aware in the dialogue box. Click OK and the change will be applied to the image.

The original image with the power lines still in the image is shown below. As can be seen by comparing the two images there can be significant improvements.