Tap/click on the token you want to send (e.g. STRK)
Tap/click Send
Select the contact or enter a new address (please note the address must be on the same blockchain, i.e. if you are sending from Starknet, the address should be on Starknet)
Choose the amount
Review send
Tap Network fee to change the token you pay the fee in.
Confirm
Please note
New destinations: When sending an asset from Argent to a new destination, please check the destination accepts transactions from the blockchain you are on. Some wallets/exchanges do not. On Ethereum if Etherscan shows a transaction succeeded but you can't see the assets, please refer to this post.
Tokens: Check the destination address supports the assets you want to send. Not all exchanges accept liquidity provider tokens, for example.