Interaction is simple. Just set the values you want and use some of the building ways to get the result. Error handling is there to help avoiding some common mistakes but should not be trusted blindly!
For detailed Less help see the docs.
Shift - all shortcuts need Shift to be held.
+ Enter - apply varibles to preview.
+ R - reset to initial varibles values.
This app is made to ease the pain when creating custom Bootstrap builds. It does so by providing access to the Less variables in charge of the "look and feel" in a user friendly interface. Allows custom builds, minifies, compiles and etc.
Made and maintained by @Colorfully for free and it is open source as software should one day be!:) Happily uses the awesome technologies: Bootstrap, Font Awesome, jQuery, Angular.js, Less, Gulp.js which are free too and have different own licenses and made this app possible.
It takes time to do it but saves time using it...