Within the Diary, you block out times you would like to not having patient bookings. 

You can do this:

Using a Windows PC and / or with a mouse: right click on the diary -> select Create Block -> fill out the details.

Using a MAC track pad: CTRL + Click in the diary -> select Create Block -> fill out the details. 

this image is from the new Diary UI, contact support if you have not yet upgraded. 

If you have multiple locations, you will need to ensure you create a block for either one location or ALL locations if you are unavailable at all locations at this time. 

If creating recurring blocks you must use the recurring feature, do not adjust the end date to cover multiple days, this will not block the diary as expected. Please see the screenshot below for how to set a Holiday block from 10am to 6pm every day from the 3/1/23 to the 13/1/23.