If you use a custom completion mechanism such as `ido-ubiquitous-mode', you might notice that functions like `describe-face' don't use it. This is because they use a function called `completing-read-multiple' to read multiple values at once, and this function doesn't use the standard completion mechanisms. This package allows you to use the standard completion mechanisms to replace `completing-read-multiple', allowing your custom completion system to work for functions that use it. When you turn on `crm-custom-mode', any command that uses `completing-read-multiple' will now prompt you again each time you enter an item. This is because it is reading a list of multiple items. To end the completion and finish the list of items, simply enter an empty string.