Type them into the DM channel..
You may create macro to go faster.
Display your character sheet
- sheet
Reload your weapon
- reload
Set your weapon on single mode if applicable
- single
Set your weapon on semi auto mode if applicable
- semiauto
Set your weapon on full auto mode if applicable
- fullauto
More to come as soon as released.
Sometimes a command may not work, wait a couple of seconds (about 6), then if it's still not working, go into your character sheet through your Character item and select "Summon Listener".