If you want to have you diary show in the full width and hide the expected arrivals there is a setting to hide this by default.
Go to 'Settings' > 'Interface Settings' and then untick 'Expand Expected Arrivals List Automatically'
Complete this change by clicking 'Save Settings'
You can still reveal the expected arrivals if required by clicking on the blue icon.
Ewan Farry
Auto-hide your expected arrivals
If you want to have you diary show in the full width and hide the expected arrivals there is a setting to hide this by default.
Go to 'Settings' > 'Interface Settings' and then untick 'Expand Expected Arrivals List Automatically'
Complete this change by clicking 'Save Settings'
You can still reveal the expected arrivals if required by clicking on the blue icon.