DropItem

Drop

Drops items. Drop from other players via /drop itemname playername. Can use /d instead.
The mod will search for the first partial match in the player's inventory, starting from their most recently acquired item stack.
Can use a number instead of itemname to drop the nth most recently acquired. For example, /d 1 will drop the most recent item stack. The recently acquired item stack is the same order as the vanilla item display sorting.
Specifying a number after playername will control the amount dropped: /d gas 0 4 will drop 4 gasolines from the host player.
/drop all will drop all items in inventory.

Drop equipment via /d e, /drop equip or /drop equipmentname

Can also drop items by clicking on them. shift-clicking on an item will instead only drop one item. Both keybinds can be changed with RiskOfOptions or the dropitem_reloadconfig command. Can also drop items via console command dropitem.

Give

Give your items to other people by doing /give itemname playername, /g, or drag and drop the item onto their inventory in the ui.

Lock Inventory

Lock your inventory via /lock, /lockinventory or the lockinventory_di console command, preventing other players from accessing your inventory. Can also be set in the config to be applied automatically when joining a lobby.

Block User

Blacklist players via the /b /block or the blockuser commands, which will prevent them from using the drop command. Only host can block users. To unblock a player simply /block them again.

Access ingame help text via /drop or /drop help, which will output the following message:
/d itemname playername
Items with spaces need to be typed without them: Scrap, Green -> scrapg