Add custom items to chest commands

How can I add my custom items to ChestCommands

Hey, Volunteer here!

Here is an example from my server!

right:

CUSTOM-ITEM: secret:icon_right_blue

POSITION-X: 9

POSITION-Y: 2

NAME: '&2Right'

LORE:

- '&eGo forward a page.'

ACTIONS:

- 'sound: ENTITY_ITEM_PICKUP, 2.0, 0.5'

- "open: c0d3_2.yml"

Thank you for ur help!
Is there any list of all possible things u can do?

You can create invisible buttons using my chestcommands fork.
Add the BLANKattribute to the item, example downloadable here.