- contextual-begin CONTEXT PANEL FLAG-OR-FLAGS SIZE TRIGGER-BOUNDSprocedure
Starts a context block. SIZE is a vector describing its size. TRIGGER-BOUNDS is a rectangle specifying where it can be triggered with a right mouse click. FLAG-OR-FLAGS is a symbol or list of symbols, each of which must be one of (border border-header movable scalable closable minimizable dynamic no-scrollbar title). Returns #t if the context block is visible.