Quick Mask Tool

to use the quick mask tool you select paint and then go to the paint tool then click quick mask tool (below)

you then select the area you want to edit, a pink overlay will appear like so

Then you simply click the icon below again, and then inverse selection. The selected area can now be modified.

Hue/Saturation

To get to this screen go

Image > adjustments > hue/saturation.

The image can then be recoloured

Polygonal lasso tool

The polygonal lasso tool allows you to select irregular areas

Image adjustments

Brightness/contrast

Brightness and contrast allows you to adjust certain colour elements of the image

Before

After

Levels

Levels allows you to adjust the image in more complicated ways

Before

After

Curves

Curves, like levels, is a more in depth way of editing colour in images

Before

After

Square Marquee tool

the square marquee tool can be used to select rectangular areas in your image, you simply click and drag from one corner of the area you want to select to the other.

‘Marching ants’ will then appear around the area that has been selected, like so

The highlighted area can then be modified in a variety of ways.

Today, we will use filters.

Filters

The filter option allows you to modify a selected area in an image. To use a variety of filters Adobe Photoshop comes with, simply click ‘Filter’ at the top, and choose a filter you would like to use.

This is an example of an image that has had a filter applied to it

Inverse selection

To inverse the selection, you can either click ‘Select’ at the top menu bar and then click ‘Inverse’ or you can press Control+Shift+I.

What inverse selection does is inverses what part of the image is selected.

Below is the same image with the same filter applied with inverse selection.