How to add shortkey for tier 5 skill

[pasture 0]

Dear all,

 

As the title is, anyone can help me to add short key for tier 5 skill.

When i have to use tier 5 skill I have to use S key and choose by my mouse.

 

Thanks you for your support

 

 

[Immortal 40]

4,5,6 numbers man

[pasture 0]

4,5,6 numbers man

many thanks man