Comment # 2 on bug 1074433 from pie Lud

@josef 

You said "put to kernel parameters in boot menu for installation 
startshell=1" before this
(https://doc.opensuse.org/documentation/leap/startup/html/book.opensuse.startup/cha.inst.html#sec.i.yast2.bootscreen),
right?

How/where do I put the kernel parameters in boot menu for installation?