Impress: how to start ppt in edit mode

Hi, when I open a .ppt file impress starts it automatically in slideshow mode and I can’t edit the slide. If I press ESC to exit the slideshow mode impress turn off. How can I disable impress to start in slideshow and set edit mode as default?

Are you sure it’s a PPT file? Google gives lots of talk about PPS files starting in slideshow mode.

originally it was a ppsm file, but looking at internet many people say to rename it to ppt so i can modify it, but doesn’t work

This might be important. You should update the question accordingly.