Capture One's highly customizable user interface allows you to put the tools you need within reach. You can also collapse or expand tools to keep them nearby, but with a minimal size. This can be done with the arrow to the left of the tool's title.
Tools can also be floated out, off of the tool pane. To do so, click drag the tool's title bar off of the tool pane. To return it to the tool pane, drag it back until you see the orange highlight.
For some tools, you can even resize them beyond the scope of the tool pane's real estate. Drag them out of the tool pane and resize the tool at the corner.