You can choose your desired margin type (isolated/cross) and leverage level for each symbol that is available on the client's exchange. In some of the exchanges, the leverage level is set the same for all symbols.
The leverage setting can be set in the 'Trading Configuration' section through the Telegram Bot:
Main Menu > Bot Configuration > Trading > select client name > Margin > Leverage.
Or through your Mobile App / Web Dashboard:
Main Menu > Accounts & Groups/ Accounts & Configuration > choose your account > Trading Configuration > Edit > Margin > Leverage.
By choosing "All Symbols" you will be able to configure all pairs at once. Any previously selected leverages for a specific symbol will be overridden with the new value, but you will be able to change the leverage for a specific symbol later if you wish to do so.
Since different coins have different valid leverage values you will only be able to choose a leverage that is valid for all the coins in the exchange.
Please make sure to click "Switch to Personal Configuration" in order to override the signal's leverage.
Read more about leverage: Margin Trading