tool guide

 Magnify - Zoom in and
 out of the image. Use left click to zoom in, and use right click to zoom out.

 Move - Move a selected region, or if there is no selected region, move the whole image.

 Square Region - Select a square region of your image. You may also do this at any time by
 holding the right mouse button and dragging the mouse.

 Circular Region - Select a circular region of your image.

 Lasso - Select any shape of region from your image by drawing it and dragging it away.

 Magic Wand - Select regions of similar color. By adjusting the threshold (by clicking the arrow
 to the right of the tool) you may select colors that are less similar to each other. The higher the threshold, the less similar they can be. The lower the threshold, the closer they have to be. If the threshold is at 0, then they must be the exact same color.

 Color Region - Select every area of your image that a chosen color appears.

 Pencil - Draw lines of a selected color.

 Straight Lines - Create straight lines.

 Curved Lines - Create curved lines.

 Border - Create square borders around a selected area by holding and dragging the left mouse
 button.

 Square  - Create filled squares by holding and dragging the left mouse button.

 Circular Outline - Create a circle by holding and dragging the left mouse button.

 Circle - Create a circle by holding and dragging the left mouse button.

 Paint Bucket - Fill entire enclosed regions with a selected color.

 Color Replace - Replace all of the areas with one color with another color. (background color
 is the old color, foreground color replaces it.)

 Text - Create text to add to your image.

Shortcuts

Eyedropper - Right click on the color you want to choose.
Square Selection - Hold right click and drag the mouse.
Cropping - To crop down an image, select the part you want and click