i sure these kind of questions asked many times users, reason, these features not available in flash, although me @ least, seems logical should be.. but, either complicated implement them, because of how library/symbol features implemented, , need adjust , use flash in few ways can used. nevertheless, have option to: swap single instance @ once on multiple keyframes on timeline, rename single instance @ once on multiple keyframes on timeline, duplicate , rename multiple symbols in library @ once, annoying spacebar behavior: have click on stage before hand tool appears , can move stage, distribute symbols - in, select multiple shapes, txt, images or whatever objects have on stage, , convert them symbols on-the-fly, rename multiple instances @ once on multiple keyframes on timeline, ... these top of head @ moment, sure people can add more of own list... if there ways achieve these, or @ least some, apologize , please englighten me... make request(s): https://www.adobe.com/cfusion/