Download patch
ref: d5f7c4f871200f9808e284408e28defaa8afbcd3 parent: 7478275c8b46c24eb457dd3458ace3a31263295b author: Jonas Kölker <jonaskoelker@yahoo.com> date: Mon Sep 21 13:39:47 EDT 2015
Range: add pencil marks to squares by Shift-cursor keys.