It is harder for people to stay engaged in front of a screen for a long duration (e.g. half of day). Break a full-day process into multiple sessions, and schedule sessions that take no more than 120 minutes, including at least one generous break.
During the breaks, you should nudge people away from technology, to help them incubate and replenish energy — you might want to include an easy, accessible break activity that ”forces” the participants away from their screens.
Adapt your pace by allotting more time per activity than you are used to: this will allow the participants to think through, it will give them the space to reflect on their input. Be patient and comfortable with their silence.
Before the session, test a lot —make sure the technology works, and that switching from one platform to another is easy. Build a back-up plan with one tool (i.e. a Zoom meeting where your co-facilitator records the conversation and shares the screen).
When it comes to content in a remote facilitation session less is more; you should use plenty of visuals and icons, and explain everything in writing — ideally, with fewer words, and more imagery.
To ensure engagement, you should apply two rules. First, if one person is remote, everyone should be remote — even if they are in the same building. Second, video should be mandatory for all, so you can assess engagement through body language.