>>17783
That thing about editing the layer name to change the frame properties is a blatant hack. This was bothersome for me because I needed to control the timing of frames broadly over dozens of frames and doing so manually was obviously out the question so I wrote some bydlo-level lisp to automate that. Here is simple example:

(define (-1+ n)

  (- n 1))



(define (rename-all-layers image renamer)

  (let*

    ((res (gimp-image-get-layers image))

     (nlayers (car res))

     (layers (vector->list (cadr res)))

     (loop

       (lambda (total-layers layers)

         (if (> (length layers) 0)

             (let*

               ((layer (car layers))

                (layer-index (-1+ (length layers)))

                (layer-name (renamer layer layer-index total-layers)))