No icon Ability

How can i make an ability not show up in the units menu console?

replies are greatly appreciated

Passive abilities can be hidden with the spellbook trick:

Create a spellbook with the passive inside it.
Give the spellbook ability to the unit which should get the passive ability.
Disable the spellbook ability for the owner of the unit.

And remember to give the spellbook ability a custom order id, else the hidden spells will show up in 'normal' spellbooks that the unit has, if any.

Active abilities (ones that you normally click on or use hotkeys for) cannot be hidden and still have their hotkey work.

What about Default Active Ability? I thought that did the same thing.

Default Active Ability just, by default, makes that ability have auto-cast active.

Ah, so if a unit has Frost Arrows and it's set as defalt active, Frost Arrow will be auto-cast when the unit is created? Neat. Thanks for that!