Hello,
This is a problem related to the definition of your screen which changed (under Linux Mint you changed the resolution, or you use two physical screens). The solution is to use the repositioning of the dialog using the keyboard, here is the standard procedure:
- Alt + F7 : to activate the movement of the window
- move the mouse, until the top edge is visible
- validate the new position by clicking
Now you should be able to resize the window.
The alternative would be to delete the oStorybook.ini preferences file located in the hidden ".storybook5" folder of your home directory. But in this case you will lose all your other settings.
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