Bucket enables you to fill up an area of selected pixels. The bucket color will be the current color (as specified in the Color window).
This tool is located at:
|Tool bar||Menu bar||Shortcuts|
|Drawing > Bucket||B|
Then simply select a layer, select some pixels you want to fill up with a particular color, and click on the area you want to fill up. Note that if you click with the right mouse button (instead of the left mouse button), you will fill up with the second color (i.e. if the current color is the primary color, you will then fill up with the secondary color, and vice versa).
You may also use the eyedropper when drawing with the pen or the bucket. To do this, hold Shift and click on your character like you would with the eyedropper.
If you draw over a layer from the library, Game Character Hub will automatically insert a drawing layer above (unless you chose the overwriting mode). This is to preserve the integrity of the item.
Upon selecting the tool, a new toolbar shall appear. This toolbar enables you to change some bucket settings.