Alt-F7 to move window on screen.

doc/erko_howto_tools.txt

@@ -947,6 +947,9 @@ Quartus version meeting minutes 13 may 2020 (RW, LH JH, EK):
 * Linux
 *******************************************************************************
 
+# Window outside screen
+Doe Alt-F7 in window, daarna kun je het met de muis slepen.
+
 # Linux Mint version
 > cat /etc/issue