Room link presets can be created and edited within Fresco Studio or on the Fresco Touchscreen.
On the Fresco Touchscreen, the Linking option must be enabled (Menu -> Setup -> Controller).
Presets can also only be created or edited by a user with Configure or Administrator privileges.
Within Fresco Studio, select the controller in the Hardware tree and navigate to the Room Link Settings tab.
In either case, the link presets are configurable per Fresco Touchscreen, this allows having spaces with different presets available per touchscreen / space.