Wijmo includes several glyphs (images) defined as pure CSS, but if you're using Bootstrap, you might want to use their images instead. Adding a few CSS rules to your application will enable you to customize the glyphs used in Wijmo controls. The default Wijmo glyphs are used by the Wijmo controls and extensions, and your applications may also use them. Using CSS to define glyphs eliminates the need to deploy extra font or image files, and ensures the images are rendered using the foreground color and font size defined by the current theme. To use Wijmo glyphs in your applications, add a span element to your markup and set its class to the glyph name. For example:
The CSS code was copied from the Bootstrap CSS files. It uses a custom font that defines a number of useful images. In this example, we used the definitions for the glyphicon-collapse-down and glyphicon-collapse-up images. You can see the complete list in the Bootstrap CSS documentation. After adding this CSS to the application, the grid’s appearance changes as follows: Using custom glyphs in FlexGrid You can see and modify this example in this fiddle: http://jsfiddle.net/Wijmo5/3sgh6hLc/.