How can we change thumbnail on a media

I remember I could change a thumbnail at my last job (Mr.X) on any media I was uploading. Right click upload new thumbnail.

Because be default SHotgrid use the frame 4 or more as a thumbnails, maybe not the one I want to be the default.

Is there an option to unlock? Or we need to script it ? If any answer, please bring me some steps :slight_smile:

Your thumbnail may be set to generate from a Query, at that point you cannot upload a thumbnail for it.
You would have to unset that setting by right clicking the thumbnail field and go to configure field.