Uncommon Knowledge - WC_Crt_VDepth%

Used to store the "depth" of the current prompt on the screen. This variable is set to 0 (not 1) for single valued fields. In the case of multi-valued fields (associated and non-associated) and text fields the variable contains the amount of lines to prompt for before scrolling the screen display. Note that this is not the same as depth, as horizontal multi-values cannot be said to have a depth.

(Volume 2, Issue 10, Page 10)