First enable console:
Steam > Library > Right click Dota 2 Properties > Set Launch Options > add "-console"
In Dota 2:
Settings > Metagame > set a console hotkey, I use numpad minus
console command:
dota_range_display 1150
This permanently displays a 1150 radius circle. True blink dagger range is about 1150. If you click exactly 1150 it will blink that far, if you click further than 1150 it only blinks about 1100. Experience range is also about ~1150, so when you're off-laning you can stand exactly in experience range, etc. Pudge hook is 1300.
To enable commands when dota 2 launches automatically, create a file "autoexec.cfg" in folder Steam > steamapps > common > dota 2 beta > dota > cfg
with your console commands
by 