First download MathWallet:https://www.mathwallet.org
Switch to NEAR wallet ,open DApp – NEAR Staking Tool
Add staking
Click +stake
Select the validator, CURRENT means the active account, and the commission rate is the commission charged by the validator, which will be deducted from the income
Click Delegate
Choose active/lockup account
Unstake
Click corresponding delegation
Click Unstake
Enter the unstake amount and click unstake
Note: It takes about two days for the staking assets to be released. After the end of the lock-up period, the unstaked asset will become cashable asset.