In Pixly, everything that can be accessed through the toolbar is considered to be a tool, and we currently have about 21 of these.
Some tools can be customized or changed in the way they operate, if you find a tool like this (examples are the Bucket fill and Line tools, but there's more!), you can access its settings by tapping the icon which appears that tool and a screw driver:
If you touch it, you'll find out all the settings you can change for that selected tool.
Here's one sample for the Bucket fill:
The tools themselves
If you want to know more about the tools, I'd recommend you to read the subpages of this guide. You can find them just at the right of this text, under the purple "Toolbar" line.
Quick tip: You might want to keep in mind that most of the tools are affected by color and brush settings! Don't forget to check out that section of the guide!