Send in a Support Request. Bricsys will send you a trial license key, which enables you to try the advanced features for a 30 days limited time period.
When the trial license key expires, you have to re-enter your 'old' license key using the same procedure.
You can see all your license keys in your account on the Bricsys website.
I cannot try advanced features.
Some commands are available in a higher license level only. The necessary license level for each command is indicated in the Command Reference.
You can always install the latest BricsCAD version in trial mode, which uses in the highest license level.