Which tool allows you to change the color of a shape in a document?

The tool that allows you to change the color of a shape in a document is indeed the Shape Fill/Outline feature. This option is specifically designed for manipulating the visual aspects of shapes, such as altering their fill color (the interior color of the shape) and outline color (the color of the border around the shape). This makes it a fundamental tool for customizing shapes to fit the desired aesthetic of a document.

In contrast, the Thesaurus is a tool used for finding synonyms and antonyms for words, which does not involve any visual design elements. Spell Check, on the other hand, is a function that scans text for spelling errors and suggests corrections; it also does not provide any options for changing colors in shapes. The Format Painter is a tool that allows users to copy formatting from one part of the document and apply it to another, which could include aspects of text but does not specifically target changes to shape colors.