You can set and adjust your leverage by clicking on the Cross/Isolated button in the top of Order Controls panel:
By default, it will be set to Cross, however, once you change it, it will remain on what you've set until you exit your position. Once your position is closed, it will automatically revert back to Cross shortly after.
What happens when I change my leverage?
Changing your leverage here will instantly update your leverage on your open position. If you increase your leverage, you reduce the amount of margin assigned to your position and that balance goes back to your Available Balance. Equally, if you decrease leverage, you increase the margin assigned to your position and it will be taken from your Available Balance.
What's the difference between Cross and Isolated Margin?
To learn about the difference between Cross and Isolated Margin (1x-100x), please have a look at our Isolated and Cross Margin guide.
What's the difference between Single-Asset and Multi Asset Margining?
To learn about the difference between Single-Asset and Multi Asset Margining, please have a look at our What Asset Margining Modes are there? guide.