So whats the approach for this meta information? Will u ever use this meta information to perform the inverse of an operation? When resizing an image u lose pixels, so you would have to store size T in memory. No meta information there really. On Thu, 2002-10-31 at 03:20, Sven Neumann wrote: > Hi, > > Hunter Peress <hu.peress@xxxxxxxxxxxxxx> writes: > > > Suppose 100 actions are done to an image of size T > > Would gimp's memory increase by 100T ? > > it depends on what you are undoing. Only the altered tiles and the > necessary meta information to undo the action is stored in the undo > system. > > > Salut, Sven > >