Synopsis
(:scroll-parent distance &opt depth)Description
Scrolls an unconstained parent frame by the amount specified by distance (in pixels). Use a positive distance to scroll forward, or a negative distance to scroll backward.
Depth specifies which level of frames should be affected. 1 means to scroll top-level frames, and 2 means to scroll children of top-level frames, etc. Defaults to the parent of the current active leaf frame.
Does nothing if the parent frame is constrained.