**(mouseover-append: // [[harlowe:HookName|HookName]] or [[harlowe:String|String]]//) -> //[[harlowe:Changer|Changer]]//**

This is similar to [[harlowe:click-append|(click-append:)]], but uses the [[harlowe:mouseover|(mouseover:)]] macro's behaviour instead of
[[harlowe:click|(click:)]]'s. For more information, consult the description of [[harlowe:click-append|(click-append:)]].