hello,
works for v7.7:
- start eagle, no schematic+ board open, only control panel
- resize only control panel as you wish
- place/drag the vertical window-splitter, so that you get the desired witdh for the main-part (with the libraries)
- menupoint options --> window-positions-> save
- close eagle, start eagle again and check wether the window-positions are saved and restored (ok) or not (bad, but than I can't help).
Maik