how to assign hot key to specific tool like polyextrude or polybevel.

Hey seifdune,
if you want to use this tools in the viewport you might take a look at the radial menus.
Cheers
CYTE

Go to the Polygon shelf -> Ctrl+Alt+Shit (LMB) click on the PolyExtrude -> then Hotkey Manager pops up and there you can setup your hotkey.

https://www.sidefx.com/docs/houdini/basics/hotkeys [www.sidefx.com]

Thanks guys for your help. I just want to use hotkeys to increase modeling speed,houdini bevel,extrude tools are amazing. I hope sideFX add symmetry to the add loop tool. Symmetry will help to quick add loops to geometry, apply one side and use symmety to add another onfly like modo addloop.