Hi Based on the question of Claudio Carrelli (Slide show duration change), I made this simple macro that allows you to change the duration of each slide, by a certain percentage, automatically. The macro can be adapted to other forms, such as adding or removing a fixed amount to the duration of each slide, or modify only the slides that have a longer or shorter time value (or what do you want?). You can also adjust other variables of slides. MUR The instructions are on sheet 1 of the Excel Boo