Seems the update to Electron v1+ has changed some behaviors in the Chromeless window, and now the rulers are able to resize themselves to negative widths and heights:

Before the update, the rulers would lock themselves out at a width/height of 0,0, and not the rulers get smaller than that.
Seems the update to Electron
v1+has changed some behaviors in the Chromeless window, and now the rulers are able to resize themselves to negative widths and heights:Before the update, the rulers would lock themselves out at a width/height of
0,0, and not the rulers get smaller than that.